557251728 has 80 divisors (see below), whose sum is σ = 1638752256. Its totient is φ = 161518720.

The previous prime is 557251727. The next prime is 557251769. The reversal of 557251728 is 827152755.

It is a self number, because there is not a number n which added to its sum of digits gives 557251728.

It is not an unprimeable number, because it can be changed into a prime (557251727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10800 + ... + 35087.

Almost surely, 2^557251728 is an apocalyptic number.

It is an amenable number.

557251728 is an abundant number, since it is smaller than the sum of its proper divisors (1081500528).

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

557251728 is a wasteful number, since it uses less digits than its factorization.

557251728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45932 (or 45926 counting only the distinct ones).

The product of its digits is 196000, while the sum is 42.

The square root of 557251728 is about 23606.1798688394. The cubic root of 557251728 is about 822.9064656419.

The spelling of 557251728 in words is "five hundred fifty-seven million, two hundred fifty-one thousand, seven hundred twenty-eight".