556345404 has 18 divisors (see below), whose sum is σ = 1406317640. Its totient is φ = 185448456.

The previous prime is 556345393. The next prime is 556345409. The reversal of 556345404 is 404543655.

556345404 is a `hidden beast` number, since 55 + 63 + 4 + 540 + 4 = 666.

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

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 15454039 = 556345404 / (5 + 5 + 6 + 3 + 4 + 5 + 4 + 0 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556345409) by changing a digit.

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, 7726984 + ... + 7727055.

Almost surely, 2^556345404 is an apocalyptic number.

It is an amenable number.

556345404 is an abundant number, since it is smaller than the sum of its proper divisors (849972236).

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

556345404 is a wasteful number, since it uses less digits than its factorization.

556345404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15454049 (or 15454044 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

The square root of 556345404 is about 23586.9753041801. The cubic root of 556345404 is about 822.4600937146.

The spelling of 556345404 in words is "five hundred fifty-six million, three hundred forty-five thousand, four hundred four".