556389405 has 120 divisors (see below), whose sum is σ = 1179779040. Its totient is φ = 248676480.

The previous prime is 556389401. The next prime is 556389409. The reversal of 556389405 is 504983655.

556389405 is a `hidden beast` number, since 5 + 5 + 638 + 9 + 4 + 0 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (556389401) and next prime (556389409).

It is not a de Polignac number, because 556389405 - 2² = 556389401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556389401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 752526 + ... + 753264.

It is an arithmetic number, because the mean of its divisors is an integer number (9831492).

Almost surely, 2^556389405 is an apocalyptic number.

556389405 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

556389405 is an abundant number, since it is smaller than the sum of its proper divisors (623389635).

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

556389405 is a wasteful number, since it uses less digits than its factorization.

556389405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793 (or 771 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The square root of 556389405 is about 23587.9080250878. The cubic root of 556389405 is about 822.4817757562.

The spelling of 556389405 in words is "five hundred fifty-six million, three hundred eighty-nine thousand, four hundred five".