55487976 has 32 divisors (see below), whose sum is σ = 139999200. Its totient is φ = 18325440.

The previous prime is 55487969. The next prime is 55487989. The reversal of 55487976 is 67978455.

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, 7990 + ... + 13221.

It is an arithmetic number, because the mean of its divisors is an integer number (4374975).

Almost surely, 2^55487976 is an apocalyptic number.

It is an amenable number.

55487976 is an abundant number, since it is smaller than the sum of its proper divisors (84511224).

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

55487976 is a wasteful number, since it uses less digits than its factorization.

55487976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21329 (or 21325 counting only the distinct ones).

The product of its digits is 2116800, while the sum is 51.

The square root of 55487976 is about 7449.0251711214. The cubic root of 55487976 is about 381.4166328476.

The spelling of 55487976 in words is "fifty-five million, four hundred eighty-seven thousand, nine hundred seventy-six".