25439952 has 20 divisors (see below), whose sum is σ = 65720000. Its totient is φ = 8479968.

The previous prime is 25439951. The next prime is 25439959. The reversal of 25439952 is 25993452.

It is a self number, because there is not a number n which added to its sum of digits gives 25439952.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25439951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264952 + ... + 265047.

It is an arithmetic number, because the mean of its divisors is an integer number (3286000).

Almost surely, 2^25439952 is an apocalyptic number.

It is an amenable number.

25439952 is an abundant number, since it is smaller than the sum of its proper divisors (40280048).

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

25439952 is a wasteful number, since it uses less digits than its factorization.

25439952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530010 (or 530004 counting only the distinct ones).

The product of its digits is 97200, while the sum is 39.

The square root of 25439952 is about 5043.8033268556. The cubic root of 25439952 is about 294.1070460305.

The spelling of 25439952 in words is "twenty-five million, four hundred thirty-nine thousand, nine hundred fifty-two".