278975 has 6 divisors (see below), whose sum is σ = 345960. Its totient is φ = 223160.

The previous prime is 278947. The next prime is 278981. The reversal of 278975 is 579872.

It is not a de Polignac number, because 278975 - 2⁶ = 278911 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5555 + ... + 5604.

It is an arithmetic number, because the mean of its divisors is an integer number (57660).

2²⁷⁸⁹⁷⁵ is an apocalyptic number.

278975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

278975 is a deficient number, since it is larger than the sum of its proper divisors (66985).

278975 is a wasteful number, since it uses less digits than its factorization.

278975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11169 (or 11164 counting only the distinct ones).

The product of its digits is 35280, while the sum is 38.

The square root of 278975 is about 528.1808402432. The cubic root of 278975 is about 65.3413989996.

The spelling of 278975 in words is "two hundred seventy-eight thousand, nine hundred seventy-five".