557978 has 8 divisors (see below), whose sum is σ = 842772. Its totient is φ = 277056.

The previous prime is 557927. The next prime is 557981. The reversal of 557978 is 879755.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 552049 + 5929 = 743^2 + 77^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×557978² = 622678896968, 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, 575 + ... + 1202.

2⁵⁵⁷⁹⁷⁸ is an apocalyptic number.

557978 is a deficient number, since it is larger than the sum of its proper divisors (284794).

557978 is a wasteful number, since it uses less digits than its factorization.

557978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1936.

The product of its digits is 88200, while the sum is 41.

The square root of 557978 is about 746.9792500465. The cubic root of 557978 is about 82.3263811308.

The spelling of 557978 in words is "five hundred fifty-seven thousand, nine hundred seventy-eight".