25640364 has 24 divisors (see below), whose sum is σ = 60722368. Its totient is φ = 8418960.

The previous prime is 25640353. The next prime is 25640383. The reversal of 25640364 is 46304652.

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, 15142 + ... + 16749.

Almost surely, 2^25640364 is an apocalyptic number.

It is an amenable number.

25640364 is an abundant number, since it is smaller than the sum of its proper divisors (35082004).

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

25640364 is a wasteful number, since it uses less digits than its factorization.

25640364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31965 (or 31963 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 25640364 is about 5063.6315031803. The cubic root of 25640364 is about 294.8773367266.

The spelling of 25640364 in words is "twenty-five million, six hundred forty thousand, three hundred sixty-four".