55839720 has 32 divisors (see below), whose sum is σ = 167519520. Its totient is φ = 14890560.

The previous prime is 55839709. The next prime is 55839731. The reversal of 55839720 is 2793855.

It is an interprime number because it is at equal distance from previous prime (55839709) and next prime (55839731).

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, 232546 + ... + 232785.

It is an arithmetic number, because the mean of its divisors is an integer number (5234985).

Almost surely, 2^55839720 is an apocalyptic number.

It is an amenable number.

55839720 is an abundant number, since it is smaller than the sum of its proper divisors (111679800).

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

55839720 is a wasteful number, since it uses less digits than its factorization.

55839720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465345 (or 465341 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 55839720 is about 7472.5979418138. The cubic root of 55839720 is about 382.2208822790.

The spelling of 55839720 in words is "fifty-five million, eight hundred thirty-nine thousand, seven hundred twenty".