25376640 has 64 divisors (see below), whose sum is σ = 80894160. Its totient is φ = 6766592.

The previous prime is 25376629. The next prime is 25376707. The reversal of 25376640 is 4667352.

It is a tau number, because it is divible by the number of its divisors (64).

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, 4689 + ... + 8528.

Almost surely, 2^25376640 is an apocalyptic number.

25376640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25376640 is an abundant number, since it is smaller than the sum of its proper divisors (55517520).

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

25376640 is a wasteful number, since it uses less digits than its factorization.

25376640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13239 (or 13227 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 25376640 is about 5037.5232009391. The cubic root of 25376640 is about 293.8628635265.

The spelling of 25376640 in words is "twenty-five million, three hundred seventy-six thousand, six hundred forty".