25387664 has 20 divisors (see below), whose sum is σ = 52082604. Its totient is φ = 11947008.

The previous prime is 25387657. The next prime is 25387693. The reversal of 25387664 is 46678352.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15147664 + 10240000 = 3892^2 + 3200^2 .

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46397 + ... + 46940.

Almost surely, 2^25387664 is an apocalyptic number.

It is an amenable number.

25387664 is an abundant number, since it is smaller than the sum of its proper divisors (26694940).

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

25387664 is a wasteful number, since it uses less digits than its factorization.

25387664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93362 (or 93356 counting only the distinct ones).

The product of its digits is 241920, while the sum is 41.

The square root of 25387664 is about 5038.6172706408. The cubic root of 25387664 is about 293.9054102048.

The spelling of 25387664 in words is "twenty-five million, three hundred eighty-seven thousand, six hundred sixty-four".