25664960 has 56 divisors (see below), whose sum is σ = 61661040. Its totient is φ = 10174464.

The previous prime is 25664959. The next prime is 25664983. The reversal of 25664960 is 6946652.

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, 44192 + ... + 44768.

It is an arithmetic number, because the mean of its divisors is an integer number (1101090).

Almost surely, 2^25664960 is an apocalyptic number.

25664960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25664960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30830520).

25664960 is an abundant number, since it is smaller than the sum of its proper divisors (35996080).

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

25664960 is a wasteful number, since it uses less digits than its factorization.

25664960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733 (or 723 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 25664960 is about 5066.0596127562. The cubic root of 25664960 is about 294.9715954649.

The spelling of 25664960 in words is "twenty-five million, six hundred sixty-four thousand, nine hundred sixty".