557520690 has 64 divisors (see below), whose sum is σ = 1405734912. Its totient is φ = 141240000.

The previous prime is 557520581. The next prime is 557520697. The reversal of 557520690 is 96025755.

It is a super-2 number, since 2×557520690² = 621658639556152200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (557520697) 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, 101515 + ... + 106865.

It is an arithmetic number, because the mean of its divisors is an integer number (21964608).

Almost surely, 2^557520690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 557520690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (702867456).

557520690 is an abundant number, since it is smaller than the sum of its proper divisors (848214222).

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

557520690 is a wasteful number, since it uses less digits than its factorization.

557520690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5535.

The product of its (nonzero) digits is 94500, while the sum is 39.

The square root of 557520690 is about 23611.8760372826. The cubic root of 557520690 is about 823.0388384747.

The spelling of 557520690 in words is "five hundred fifty-seven million, five hundred twenty thousand, six hundred ninety".