868624 has 15 divisors (see below), whose sum is σ = 1690213. Its totient is φ = 432448.

The previous prime is 868613. The next prime is 868639. The reversal of 868624 is 426868.

The square root of 868624 is 932.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 176400 + 692224 = 420^2 + 832^2 .

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 868624.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3612 + ... + 3844.

868624 is a Friedman number, since it can be written as (846+86)^2, using all its digits and the basic arithmetic operations.

2⁸⁶⁸⁶²⁴ is an apocalyptic number.

868624 is the 932-nd square number.

It is an amenable number.

868624 is a deficient number, since it is larger than the sum of its proper divisors (821589).

868624 is an equidigital number, since it uses as much as digits as its factorization.

868624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474 (or 235 counting only the distinct ones).

The product of its digits is 18432, while the sum is 34.

The cubic root of 868624 is about 95.4136716090.

The spelling of 868624 in words is "eight hundred sixty-eight thousand, six hundred twenty-four".