25640052 has 24 divisors (see below), whose sum is σ = 59941056. Its totient is φ = 8530368.

The previous prime is 25640033. The next prime is 25640057. The reversal of 25640052 is 25004652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25640057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5673 + ... + 9135.

It is an arithmetic number, because the mean of its divisors is an integer number (2497544).

Almost surely, 2^25640052 is an apocalyptic number.

It is an amenable number.

25640052 is an abundant number, since it is smaller than the sum of its proper divisors (34301004).

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

25640052 is a wasteful number, since it uses less digits than its factorization.

25640052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4087 (or 4085 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 25640052 is about 5063.6006951575. The cubic root of 25640052 is about 294.8761406684.

The spelling of 25640052 in words is "twenty-five million, six hundred forty thousand, fifty-two".