25390624 has 36 divisors (see below), whose sum is σ = 58152654. Its totient is φ = 10881024.

The previous prime is 25390601. The next prime is 25390627. The reversal of 25390624 is 42609352.

It can be written as a sum of positive squares in only one way, i.e., 14288400 + 11102224 = 3780^2 + 3332^2 .

It is a plaindrome in base 5.

It is a zygodrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (25390627) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6529 + ... + 9664.

Almost surely, 2^25390624 is an apocalyptic number.

It is an amenable number.

25390624 is an abundant number, since it is smaller than the sum of its proper divisors (32762030).

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

25390624 is a wasteful number, since it uses less digits than its factorization.

25390624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16217 (or 16202 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 25390624 is about 5038.9109934588. The cubic root of 25390624 is about 293.9168321065.

Adding to 25390624 its reverse (42609352), we get a palindrome (67999976).

The spelling of 25390624 in words is "twenty-five million, three hundred ninety thousand, six hundred twenty-four".