278955 has 12 divisors (see below), whose sum is σ = 483600. Its totient is φ = 148752.

The previous prime is 278947. The next prime is 278981. The reversal of 278955 is 559872.

It is not a de Polignac number, because 278955 - 2³ = 278947 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3055 + ... + 3144.

It is an arithmetic number, because the mean of its divisors is an integer number (40300).

2²⁷⁸⁹⁵⁵ is an apocalyptic number.

278955 is a deficient number, since it is larger than the sum of its proper divisors (204645).

278955 is a wasteful number, since it uses less digits than its factorization.

278955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6210 (or 6207 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 278955 is about 528.1619069944. The cubic root of 278955 is about 65.3398374986.

The spelling of 278955 in words is "two hundred seventy-eight thousand, nine hundred fifty-five".