25939664 has 40 divisors (see below), whose sum is σ = 52868640. Its totient is φ = 12313728.

The previous prime is 25939651. The next prime is 25939679. The reversal of 25939664 is 46693952.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24947 + ... + 25965.

It is an arithmetic number, because the mean of its divisors is an integer number (1321716).

Almost surely, 2^25939664 is an apocalyptic number.

It is an amenable number.

25939664 is an abundant number, since it is smaller than the sum of its proper divisors (26928976).

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

25939664 is a wasteful number, since it uses less digits than its factorization.

25939664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107 (or 1101 counting only the distinct ones).

The product of its digits is 349920, while the sum is 44.

The square root of 25939664 is about 5093.0996455989. The cubic root of 25939664 is about 296.0202688823.

The spelling of 25939664 in words is "twenty-five million, nine hundred thirty-nine thousand, six hundred sixty-four".