25620990 has 16 divisors (see below), whose sum is σ = 61490448. Its totient is φ = 6832256.

The previous prime is 25620979. The next prime is 25621003. The reversal of 25620990 is 9902652.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 426987 + ... + 427046.

It is an arithmetic number, because the mean of its divisors is an integer number (3843153).

Almost surely, 2^25620990 is an apocalyptic number.

25620990 is an abundant number, since it is smaller than the sum of its proper divisors (35869458).

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

25620990 is a wasteful number, since it uses less digits than its factorization.

25620990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854043.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 25620990 is about 5061.7180877643. The cubic root of 25620990 is about 294.8030477001.

The spelling of 25620990 in words is "twenty-five million, six hundred twenty thousand, nine hundred ninety".