556897428 has 18 divisors (see below), whose sum is σ = 1407713034. Its totient is φ = 185632464.

The previous prime is 556897417. The next prime is 556897463. The reversal of 556897428 is 824798655.

556897428 is a `hidden beast` number, since 5 + 568 + 9 + 74 + 2 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 541120644 + 15776784 = 23262^2 + 3972^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7734651 + ... + 7734722.

Almost surely, 2^556897428 is an apocalyptic number.

It is an amenable number.

556897428 is an abundant number, since it is smaller than the sum of its proper divisors (850815606).

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

556897428 is a wasteful number, since it uses less digits than its factorization.

556897428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15469383 (or 15469378 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 54.

The square root of 556897428 is about 23598.6742847983. The cubic root of 556897428 is about 822.7320276766.

The spelling of 556897428 in words is "five hundred fifty-six million, eight hundred ninety-seven thousand, four hundred twenty-eight".