279885 has 16 divisors (see below), whose sum is σ = 458496. Its totient is φ = 145728.

The previous prime is 279883. The next prime is 279913. The reversal of 279885 is 588972.

It is not a de Polignac number, because 279885 - 2¹ = 279883 is a prime.

It is a super-2 number, since 2×279885² = 156671226450, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2⁴ + 7⁵ + 8² + 9³ + 8⁶ + 5³ .

It is a nialpdrome in base 6.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 279885.

It is not an unprimeable number, because it can be changed into a prime (279883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 507 + ... + 903.

It is an arithmetic number, because the mean of its divisors is an integer number (28656).

279885 is a Friedman number, since it can be written as 8-59+(8-2)^7, using all its digits and the basic arithmetic operations.

2²⁷⁹⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

279885 is a deficient number, since it is larger than the sum of its proper divisors (178611).

279885 is a wasteful number, since it uses less digits than its factorization.

279885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452.

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

The square root of 279885 is about 529.0415862671. The cubic root of 279885 is about 65.4123684862.

The spelling of 279885 in words is "two hundred seventy-nine thousand, eight hundred eighty-five".