279856 has 10 divisors (see below), whose sum is σ = 542252. Its totient is φ = 139920.

The previous prime is 279847. The next prime is 279857. The reversal of 279856 is 658972.

279856 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (279857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8730 + ... + 8761.

2²⁷⁹⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

279856 is a deficient number, since it is larger than the sum of its proper divisors (262396).

279856 is a wasteful number, since it uses less digits than its factorization.

279856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17499 (or 17493 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The square root of 279856 is about 529.0141775038. The cubic root of 279856 is about 65.4101091961.

It can be divided in two parts, 27985 and 6, that multiplied together give a triangular number (167910 = T₅₇₉).

The spelling of 279856 in words is "two hundred seventy-nine thousand, eight hundred fifty-six".