557638216 has 48 divisors (see below), whose sum is σ = 1149131700. Its totient is φ = 253338624.

The previous prime is 557638183. The next prime is 557638241. The reversal of 557638216 is 612836755.

It can be written as a sum of positive squares in 6 ways, for example, as 545035716 + 12602500 = 23346^2 + 3550^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62890 + ... + 71206.

Almost surely, 2^557638216 is an apocalyptic number.

It is an amenable number.

557638216 is an abundant number, since it is smaller than the sum of its proper divisors (591493484).

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

557638216 is a wasteful number, since it uses less digits than its factorization.

557638216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8386 (or 8365 counting only the distinct ones).

The product of its digits is 302400, while the sum is 43.

The square root of 557638216 is about 23614.3646113970. The cubic root of 557638216 is about 823.0966669214.

The spelling of 557638216 in words is "five hundred fifty-seven million, six hundred thirty-eight thousand, two hundred sixteen".