557056720 has 80 divisors (see below), whose sum is σ = 1420444800. Its totient is φ = 201484800.

The previous prime is 557056681. The next prime is 557056739. The reversal of 557056720 is 27650755.

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

It is a self number, because there is not a number n which added to its sum of digits gives 557056720.

It is a congruent number.

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, 173530 + ... + 176710.

It is an arithmetic number, because the mean of its divisors is an integer number (17755560).

Almost surely, 2^557056720 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 557056720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (710222400).

557056720 is an abundant number, since it is smaller than the sum of its proper divisors (863388080).

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

557056720 is a wasteful number, since it uses less digits than its factorization.

557056720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3404 (or 3398 counting only the distinct ones).

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

The square root of 557056720 is about 23602.0490635877. The cubic root of 557056720 is about 822.8104635070.

The spelling of 557056720 in words is "five hundred fifty-seven million, fifty-six thousand, seven hundred twenty".