25618864 has 40 divisors (see below), whose sum is σ = 53152848. Its totient is φ = 11919360.

The previous prime is 25618829. The next prime is 25618867. The reversal of 25618864 is 46881652.

It is not an unprimeable number, because it can be changed into a prime (25618867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25899 + ... + 26869.

Almost surely, 2^25618864 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 25618864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26576424).

25618864 is an abundant number, since it is smaller than the sum of its proper divisors (27533984).

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

25618864 is a wasteful number, since it uses less digits than its factorization.

25618864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093 (or 1087 counting only the distinct ones).

The product of its digits is 92160, while the sum is 40.

The square root of 25618864 is about 5061.5080756628. The cubic root of 25618864 is about 294.7948933364.

The spelling of 25618864 in words is "twenty-five million, six hundred eighteen thousand, eight hundred sixty-four".