25639952 has 20 divisors (see below), whose sum is σ = 53499180. Its totient is φ = 11833728.

The previous prime is 25639937. The next prime is 25639967. The reversal of 25639952 is 25993652.

It is an interprime number because it is at equal distance from previous prime (25639937) and next prime (25639967).

It can be written as a sum of positive squares in 2 ways, for example, as 10863616 + 14776336 = 3296^2 + 3844^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61427 + ... + 61842.

It is an arithmetic number, because the mean of its divisors is an integer number (2674959).

Almost surely, 2^25639952 is an apocalyptic number.

It is an amenable number.

25639952 is an abundant number, since it is smaller than the sum of its proper divisors (27859228).

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

25639952 is a wasteful number, since it uses less digits than its factorization.

25639952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123290 (or 123284 counting only the distinct ones).

The product of its digits is 145800, while the sum is 41.

The square root of 25639952 is about 5063.5908207516. The cubic root of 25639952 is about 294.8757573143.

The spelling of 25639952 in words is "twenty-five million, six hundred thirty-nine thousand, nine hundred fifty-two".