55638590 has 32 divisors (see below), whose sum is σ = 115029504. Its totient is φ = 18980640.

The previous prime is 55638589. The next prime is 55638607. The reversal of 55638590 is 9583655.

It is a Smith number, since the sum of its digits (41) 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 15 ways as a sum of consecutive naturals, for example, 12887 + ... + 16653.

It is an arithmetic number, because the mean of its divisors is an integer number (3594672).

Almost surely, 2^55638590 is an apocalyptic number.

55638590 is an abundant number, since it is smaller than the sum of its proper divisors (59390914).

55638590 is a wasteful number, since it uses less digits than its factorization.

55638590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3992.

The product of its (nonzero) digits is 162000, while the sum is 41.

The square root of 55638590 is about 7459.1279651176. The cubic root of 55638590 is about 381.7614209756.

The spelling of 55638590 in words is "fifty-five million, six hundred thirty-eight thousand, five hundred ninety".