25312864 has 96 divisors (see below), whose sum is σ = 58060800. Its totient is φ = 10782720.

The previous prime is 25312843. The next prime is 25312871. The reversal of 25312864 is 46821352.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 320377 + ... + 320455.

It is an arithmetic number, because the mean of its divisors is an integer number (604800).

Almost surely, 2^25312864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25312864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29030400).

25312864 is an abundant number, since it is smaller than the sum of its proper divisors (32747936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25312864 is a wasteful number, since it uses less digits than its factorization.

25312864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156 (or 148 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 25312864 is about 5031.1891238553. The cubic root of 25312864 is about 293.6164805000.

The spelling of 25312864 in words is "twenty-five million, three hundred twelve thousand, eight hundred sixty-four".