278958 has 16 divisors (see below), whose sum is σ = 587520. Its totient is φ = 88056.

The previous prime is 278947. The next prime is 278981. The reversal of 278958 is 859872.

It is a congruent number.

It is an unprimeable number.

278958 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1110 + ... + 1337.

It is an arithmetic number, because the mean of its divisors is an integer number (36720).

2²⁷⁸⁹⁵⁸ is an apocalyptic number.

278958 is an abundant number, since it is smaller than the sum of its proper divisors (308562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

278958 is a wasteful number, since it uses less digits than its factorization.

278958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2471.

The product of its digits is 40320, while the sum is 39.

The square root of 278958 is about 528.1647470250. The cubic root of 278958 is about 65.3400717285.

The spelling of 278958 in words is "two hundred seventy-eight thousand, nine hundred fifty-eight".