557808540 has 24 divisors (see below), whose sum is σ = 1561864080. Its totient is φ = 148748928.

The previous prime is 557808521. The next prime is 557808541. The reversal of 557808540 is 45808755.

It is a super-2 number, since 2×557808540² = 622300734593863200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 557808492 and 557808501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557808541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4648345 + ... + 4648464.

It is an arithmetic number, because the mean of its divisors is an integer number (65077670).

Almost surely, 2^557808540 is an apocalyptic number.

It is an amenable number.

557808540 is an abundant number, since it is smaller than the sum of its proper divisors (1004055540).

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

557808540 is a wasteful number, since it uses less digits than its factorization.

557808540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9296821 (or 9296819 counting only the distinct ones).

The product of its (nonzero) digits is 224000, while the sum is 42.

The square root of 557808540 is about 23617.9707002951. The cubic root of 557808540 is about 823.1804601058.

The spelling of 557808540 in words is "five hundred fifty-seven million, eight hundred eight thousand, five hundred forty".