869638 has 16 divisors (see below), whose sum is σ = 1626624. Its totient is φ = 338760.

The previous prime is 869599. The next prime is 869657. The reversal of 869638 is 836968.

It is a nialpdrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 869638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2670 + ... + 2977.

It is an arithmetic number, because the mean of its divisors is an integer number (101664).

2⁸⁶⁹⁶³⁸ is an apocalyptic number.

869638 is a deficient number, since it is larger than the sum of its proper divisors (756986).

869638 is a wasteful number, since it uses less digits than its factorization.

869638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5667.

The product of its digits is 62208, while the sum is 40.

The square root of 869638 is about 932.5438327500. The cubic root of 869638 is about 95.4507846522.

The spelling of 869638 in words is "eight hundred sixty-nine thousand, six hundred thirty-eight".