25858864 has 20 divisors (see below), whose sum is σ = 51324840. Its totient is φ = 12613760.

The previous prime is 25858843. The next prime is 25858891. The reversal of 25858864 is 46885852.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19054 + ... + 20365.

It is an arithmetic number, because the mean of its divisors is an integer number (2566242).

Almost surely, 2^25858864 is an apocalyptic number.

It is an amenable number.

25858864 is a deficient number, since it is larger than the sum of its proper divisors (25465976).

25858864 is a wasteful number, since it uses less digits than its factorization.

25858864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39468 (or 39462 counting only the distinct ones).

The product of its digits is 614400, while the sum is 46.

The square root of 25858864 is about 5085.1611577216. The cubic root of 25858864 is about 295.7125892933.

It can be divided in two parts, 2585 and 8864, that added together give a square (11449 = 107²).

The spelling of 25858864 in words is "twenty-five million, eight hundred fifty-eight thousand, eight hundred sixty-four".