25640748 has 36 divisors (see below), whose sum is σ = 74074000. Its totient is φ = 7325856.

The previous prime is 25640729. The next prime is 25640749. The reversal of 25640748 is 84704652.

25640748 is a `hidden beast` number, since 2 + 5 + 640 + 7 + 4 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (25640749) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50623 + ... + 51126.

Almost surely, 2^25640748 is an apocalyptic number.

25640748 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

25640748 is an abundant number, since it is smaller than the sum of its proper divisors (48433252).

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

25640748 is a wasteful number, since it uses less digits than its factorization.

25640748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101766 (or 101761 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 25640748 is about 5063.6694204895. The cubic root of 25640748 is about 294.8788087849.

The spelling of 25640748 in words is "twenty-five million, six hundred forty thousand, seven hundred forty-eight".