25439232 has 198 divisors, whose sum is σ = 85409028. Its totient is φ = 6709248.

The previous prime is 25439231. The next prime is 25439263. The reversal of 25439232 is 23293452.

It is a self number, because there is not a number n which added to its sum of digits gives 25439232.

It is not an unprimeable number, because it can be changed into a prime (25439231) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1956858 + ... + 1956870.

Almost surely, 2^25439232 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 25439232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42704514).

25439232 is an abundant number, since it is smaller than the sum of its proper divisors (59969796).

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

25439232 is a wasteful number, since it uses less digits than its factorization.

25439232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63 (or 25 counting only the distinct ones).

The product of its digits is 12960, while the sum is 30.

The square root of 25439232 is about 5043.7319516406. The cubic root of 25439232 is about 294.1042714043.

The spelling of 25439232 in words is "twenty-five million, four hundred thirty-nine thousand, two hundred thirty-two".