557697128 has 8 divisors (see below), whose sum is σ = 1045682130. Its totient is φ = 278848560.

The previous prime is 557697109. The next prime is 557697131. The reversal of 557697128 is 821796755.

It can be written as a sum of positive squares in only one way, i.e., 380328004 + 177369124 = 19502^2 + 13318^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×557697128² = 622052173158896768, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34856063 + ... + 34856078.

Almost surely, 2^557697128 is an apocalyptic number.

It is an amenable number.

557697128 is a deficient number, since it is larger than the sum of its proper divisors (487985002).

557697128 is a wasteful number, since it uses less digits than its factorization.

557697128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69712147 (or 69712143 counting only the distinct ones).

The product of its digits is 1058400, while the sum is 50.

The square root of 557697128 is about 23615.6119548065. The cubic root of 557697128 is about 823.1256514027.

The spelling of 557697128 in words is "five hundred fifty-seven million, six hundred ninety-seven thousand, one hundred twenty-eight".