25642630 has 64 divisors (see below), whose sum is σ = 54105408. Its totient is φ = 8663040.

The previous prime is 25642621. The next prime is 25642649. The reversal of 25642630 is 3624652.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90469 + ... + 90751.

It is an arithmetic number, because the mean of its divisors is an integer number (845397).

Almost surely, 2^25642630 is an apocalyptic number.

25642630 is an abundant number, since it is smaller than the sum of its proper divisors (28462778).

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

25642630 is a wasteful number, since it uses less digits than its factorization.

25642630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 25642630 is about 5063.8552506959. The cubic root of 25642630 is about 294.8860231914.

The spelling of 25642630 in words is "twenty-five million, six hundred forty-two thousand, six hundred thirty".