25439652 has 72 divisors (see below), whose sum is σ = 74075456. Its totient is φ = 7210944.

The previous prime is 25439627. The next prime is 25439653. The reversal of 25439652 is 25693452.

It is a super-2 number, since 2×25439652² = 1294351787762208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (25439653) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39243 + ... + 39885.

Almost surely, 2^25439652 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 25439652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37037728).

25439652 is an abundant number, since it is smaller than the sum of its proper divisors (48635804).

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

25439652 is a wasteful number, since it uses less digits than its factorization.

25439652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817 (or 812 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 25439652 is about 5043.7735873054. The cubic root of 25439652 is about 294.1058899426.

The spelling of 25439652 in words is "twenty-five million, four hundred thirty-nine thousand, six hundred fifty-two".