25387992 has 160 divisors (see below), whose sum is σ = 84506400. Its totient is φ = 6967296.

The previous prime is 25387949. The next prime is 25388003. The reversal of 25387992 is 29978352.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 131448 + ... + 131640.

It is an arithmetic number, because the mean of its divisors is an integer number (528165).

Almost surely, 2^25387992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25387992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42253200).

25387992 is an abundant number, since it is smaller than the sum of its proper divisors (59118408).

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

25387992 is a wasteful number, since it uses less digits than its factorization.

25387992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247 (or 234 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 25387992 is about 5038.6498191480. The cubic root of 25387992 is about 293.9066759187.

The spelling of 25387992 in words is "twenty-five million, three hundred eighty-seven thousand, nine hundred ninety-two".