55608720 has 80 divisors (see below), whose sum is σ = 173238912. Its totient is φ = 14755840.

The previous prime is 55608671. The next prime is 55608731. The reversal of 55608720 is 2780655.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62680 + ... + 63560.

Almost surely, 2^55608720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55608720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86619456).

55608720 is an abundant number, since it is smaller than the sum of its proper divisors (117630192).

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

55608720 is a wasteful number, since it uses less digits than its factorization.

55608720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1160 (or 1154 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 55608720 is about 7457.1254515396. The cubic root of 55608720 is about 381.6930915727.

The spelling of 55608720 in words is "fifty-five million, six hundred eight thousand, seven hundred twenty".