557720268 has 24 divisors (see below), whose sum is σ = 1487254272. Its totient is φ = 159348624.

The previous prime is 557720263. The next prime is 557720299. The reversal of 557720268 is 862027755.

It is a super-2 number, since 2×557720268² = 622103794675983648, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (557720263) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 3319680 + ... + 3319847.

It is an arithmetic number, because the mean of its divisors is an integer number (61968928).

Almost surely, 2^557720268 is an apocalyptic number.

It is an amenable number.

557720268 is an abundant number, since it is smaller than the sum of its proper divisors (929534004).

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

557720268 is a wasteful number, since it uses less digits than its factorization.

557720268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6639541 (or 6639539 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 42.

The square root of 557720268 is about 23616.1018798615. The cubic root of 557720268 is about 823.1370356369.

The spelling of 557720268 in words is "five hundred fifty-seven million, seven hundred twenty thousand, two hundred sixty-eight".