55839984 has 20 divisors (see below), whose sum is σ = 144253416. Its totient is φ = 18613312.

The previous prime is 55839977. The next prime is 55840003. The reversal of 55839984 is 48993855.

It is a happy number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 581619 + ... + 581714.

Almost surely, 2^55839984 is an apocalyptic number.

It is an amenable number.

55839984 is an abundant number, since it is smaller than the sum of its proper divisors (88413432).

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

55839984 is a wasteful number, since it uses less digits than its factorization.

55839984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163344 (or 1163338 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 51.

The square root of 55839984 is about 7472.6156063322. The cubic root of 55839984 is about 382.2214846349.

The spelling of 55839984 in words is "fifty-five million, eight hundred thirty-nine thousand, nine hundred eighty-four".