55939240 has 32 divisors (see below), whose sum is σ = 143844480. Its totient is φ = 19179072.

The previous prime is 55939237. The next prime is 55939253. The reversal of 55939240 is 4293955.

It is a self number, because there is not a number n which added to its sum of digits gives 55939240.

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, 99612 + ... + 100171.

It is an arithmetic number, because the mean of its divisors is an integer number (4495140).

Almost surely, 2^55939240 is an apocalyptic number.

It is an amenable number.

55939240 is an abundant number, since it is smaller than the sum of its proper divisors (87905240).

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

55939240 is a wasteful number, since it uses less digits than its factorization.

55939240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199801 (or 199797 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 55939240 is about 7479.2539734923. The cubic root of 55939240 is about 382.4478177921.

The spelling of 55939240 in words is "fifty-five million, nine hundred thirty-nine thousand, two hundred forty".