25307988 has 24 divisors (see below), whose sum is σ = 60493440. Its totient is φ = 8230080.

The previous prime is 25307987. The next prime is 25308011. The reversal of 25307988 is 88970352.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25307983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25228 + ... + 26211.

It is an arithmetic number, because the mean of its divisors is an integer number (2520560).

Almost surely, 2^25307988 is an apocalyptic number.

It is an amenable number.

25307988 is an abundant number, since it is smaller than the sum of its proper divisors (35185452).

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

25307988 is a wasteful number, since it uses less digits than its factorization.

25307988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51487 (or 51485 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 25307988 is about 5030.7045232254. The cubic root of 25307988 is about 293.5976262408.

The spelling of 25307988 in words is "twenty-five million, three hundred seven thousand, nine hundred eighty-eight".