55986720 has 48 divisors (see below), whose sum is σ = 176359680. Its totient is φ = 14929664.

The previous prime is 55986719. The next prime is 55986743. The reversal of 55986720 is 2768955.

It is a tau number, because it is divible by the number of its divisors (48).

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, 57840 + ... + 58799.

It is an arithmetic number, because the mean of its divisors is an integer number (3674160).

Almost surely, 2^55986720 is an apocalyptic number.

It is an amenable number.

55986720 is an abundant number, since it is smaller than the sum of its proper divisors (120372960).

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

55986720 is a wasteful number, since it uses less digits than its factorization.

55986720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116657 (or 116649 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 55986720 is about 7482.4274136138. The cubic root of 55986720 is about 382.5559916325. Note that the first 3 decimals are identical.

The spelling of 55986720 in words is "fifty-five million, nine hundred eighty-six thousand, seven hundred twenty".