879885 has 12 divisors (see below), whose sum is σ = 1525212. Its totient is φ = 469248.

The previous prime is 879881. The next prime is 879917. The reversal of 879885 is 588978.

It can be written as a sum of positive squares in 2 ways, for example, as 544644 + 335241 = 738^2 + 579^2 .

It is not a de Polignac number, because 879885 - 2² = 879881 is a prime.

It is a super-2 number, since 2×879885² = 1548395226450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 19553 = 879885 / (8 + 7 + 9 + 8 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 879885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (879881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9732 + ... + 9821.

It is an arithmetic number, because the mean of its divisors is an integer number (127101).

2⁸⁷⁹⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

879885 is a deficient number, since it is larger than the sum of its proper divisors (645327).

879885 is a wasteful number, since it uses less digits than its factorization.

879885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19564 (or 19561 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The square root of 879885 is about 938.0218547561. The cubic root of 879885 is about 95.8242226163.

It can be divided in two parts, 879 and 885, that added together give a square (1764 = 42²).

The spelling of 879885 in words is "eight hundred seventy-nine thousand, eight hundred eighty-five".