557478406 has 4 divisors (see below), whose sum is σ = 836217612. Its totient is φ = 278739202.

The previous prime is 557478403. The next prime is 557478469. The reversal of 557478406 is 604874755.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (557478403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139369600 + ... + 139369603.

It is an arithmetic number, because the mean of its divisors is an integer number (209054403).

Almost surely, 2^557478406 is an apocalyptic number.

557478406 is a deficient number, since it is larger than the sum of its proper divisors (278739206).

557478406 is a wasteful number, since it uses less digits than its factorization.

557478406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278739205.

The product of its (nonzero) digits is 940800, while the sum is 46.

The square root of 557478406 is about 23610.9806234303. The cubic root of 557478406 is about 823.0180307243.

The spelling of 557478406 in words is "five hundred fifty-seven million, four hundred seventy-eight thousand, four hundred six".