55619984 has 40 divisors (see below), whose sum is σ = 126033600. Its totient is φ = 23280768.

The previous prime is 55619969. The next prime is 55620007. The reversal of 55619984 is 48991655.

It is a happy number.

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, 959 + ... + 10590.

It is an arithmetic number, because the mean of its divisors is an integer number (3150840).

Almost surely, 2^55619984 is an apocalyptic number.

It is an amenable number.

55619984 is an abundant number, since it is smaller than the sum of its proper divisors (70413616).

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

55619984 is a wasteful number, since it uses less digits than its factorization.

55619984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11607 (or 11601 counting only the distinct ones).

The product of its digits is 388800, while the sum is 47.

The square root of 55619984 is about 7457.8806641029. The cubic root of 55619984 is about 381.7188615163.

The spelling of 55619984 in words is "fifty-five million, six hundred nineteen thousand, nine hundred eighty-four".