557778444 has 12 divisors (see below), whose sum is σ = 1301483064. Its totient is φ = 185926144.

The previous prime is 557778437. The next prime is 557778461. The reversal of 557778444 is 444877755.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×557778444² = 622233585182122272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23240757 + ... + 23240780.

It is an arithmetic number, because the mean of its divisors is an integer number (108456922).

Almost surely, 2^557778444 is an apocalyptic number.

It is an amenable number.

557778444 is an abundant number, since it is smaller than the sum of its proper divisors (743704620).

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

557778444 is a wasteful number, since it uses less digits than its factorization.

557778444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46481544 (or 46481542 counting only the distinct ones).

The product of its digits is 4390400, while the sum is 51.

The square root of 557778444 is about 23617.3335497469. Note that the first 3 decimals coincide. The cubic root of 557778444 is about 823.1656552143.

The spelling of 557778444 in words is "five hundred fifty-seven million, seven hundred seventy-eight thousand, four hundred forty-four".