55989520 has 40 divisors (see below), whose sum is σ = 130598784. Its totient is φ = 22323072.

The previous prime is 55989509. The next prime is 55989533. The reversal of 55989520 is 2598955.

It is a tau number, because it is divible by the number of its divisors (40).

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 7 ways as a sum of consecutive naturals, for example, 28407 + ... + 30313.

Almost surely, 2^55989520 is an apocalyptic number.

It is an amenable number.

55989520 is an abundant number, since it is smaller than the sum of its proper divisors (74609264).

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

55989520 is a wasteful number, since it uses less digits than its factorization.

55989520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2287 (or 2281 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 43.

The square root of 55989520 is about 7482.6145163305. The cubic root of 55989520 is about 382.5623689717.

The spelling of 55989520 in words is "fifty-five million, nine hundred eighty-nine thousand, five hundred twenty".