25231388 has 24 divisors (see below), whose sum is σ = 54345312. Its totient is φ = 9981504.

The previous prime is 25231361. The next prime is 25231397. The reversal of 25231388 is 88313252.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34295 + ... + 35022.

It is an arithmetic number, because the mean of its divisors is an integer number (2264388).

Almost surely, 2^25231388 is an apocalyptic number.

25231388 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

25231388 is an abundant number, since it is smaller than the sum of its proper divisors (29113924).

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

25231388 is a wasteful number, since it uses less digits than its factorization.

25231388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69341 (or 69339 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 25231388 is about 5023.0855059415. The cubic root of 25231388 is about 293.3011150335.

The spelling of 25231388 in words is "twenty-five million, two hundred thirty-one thousand, three hundred eighty-eight".