278 (number)
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278 (two hundred [and] seventy-eight) is the natural number following 277 and preceding 279.
In mathematics
- 278 is an even composite number with 2 prime factors.
- 278 is equal to Φ(30). It is the sum of the totient function.
- 278 is a nontotient number which means that it is an even number that doesn't follow Euler's totient function.
- 278 is the smallest semiprime number that has an anagram that is also semiprime. The other number is 287.