557664828 has 96 divisors (see below), whose sum is σ = 1542094848. Its totient is φ = 153489600.

The previous prime is 557664827. The next prime is 557664841. The reversal of 557664828 is 828466755.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557664827) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 861601 + ... + 862247.

It is an arithmetic number, because the mean of its divisors is an integer number (16063488).

Almost surely, 2^557664828 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 557664828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (771047424).

557664828 is an abundant number, since it is smaller than the sum of its proper divisors (984430020).

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

557664828 is a wasteful number, since it uses less digits than its factorization.

557664828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023 (or 1021 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 51.

The square root of 557664828 is about 23614.9280752663. The cubic root of 557664828 is about 823.1097601776.

The spelling of 557664828 in words is "five hundred fifty-seven million, six hundred sixty-four thousand, eight hundred twenty-eight".