55971984 has 20 divisors (see below), whose sum is σ = 144594416. Its totient is φ = 18657312.

The previous prime is 55971941. The next prime is 55971991. The reversal of 55971984 is 48917955.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 1166083 = 55971984 / (5 + 5 + 9 + 7 + 1 + 9 + 8 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 582994 + ... + 583089.

Almost surely, 2^55971984 is an apocalyptic number.

It is an amenable number.

55971984 is an abundant number, since it is smaller than the sum of its proper divisors (88622432).

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

55971984 is a wasteful number, since it uses less digits than its factorization.

55971984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166094 (or 1166088 counting only the distinct ones).

The product of its digits is 453600, while the sum is 48.

The square root of 55971984 is about 7481.4426416300. The cubic root of 55971984 is about 382.5224251024.

The spelling of 55971984 in words is "fifty-five million, nine hundred seventy-one thousand, nine hundred eighty-four".