55576720 has 40 divisors (see below), whose sum is σ = 129902400. Its totient is φ = 22112640.

The previous prime is 55576709. The next prime is 55576721. The reversal of 55576720 is 2767555.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 55576720.

It is not an unprimeable number, because it can be changed into a prime (55576721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14175 + ... + 17665.

It is an arithmetic number, because the mean of its divisors is an integer number (3247560).

Almost surely, 2^55576720 is an apocalyptic number.

It is an amenable number.

55576720 is an abundant number, since it is smaller than the sum of its proper divisors (74325680).

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

55576720 is a wasteful number, since it uses less digits than its factorization.

55576720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3703 (or 3697 counting only the distinct ones).

The product of its (nonzero) digits is 73500, while the sum is 37.

The square root of 55576720 is about 7454.9795439022. The cubic root of 55576720 is about 381.6198625147.

The spelling of 55576720 in words is "fifty-five million, five hundred seventy-six thousand, seven hundred twenty".