556471728 has 80 divisors (see below), whose sum is σ = 1631324160. Its totient is φ = 181537344.

The previous prime is 556471711. The next prime is 556471733. The reversal of 556471728 is 827174655.

556471728 is a `hidden beast` number, since 556 + 4 + 71 + 7 + 28 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6601 + ... + 34007.

It is an arithmetic number, because the mean of its divisors is an integer number (20391552).

Almost surely, 2^556471728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 556471728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (815662080).

556471728 is an abundant number, since it is smaller than the sum of its proper divisors (1074852432).

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

556471728 is a wasteful number, since it uses less digits than its factorization.

556471728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27471 (or 27459 counting only the distinct ones).

The product of its digits is 470400, while the sum is 45.

The square root of 556471728 is about 23589.6529860021. The cubic root of 556471728 is about 822.5223383714.

It can be divided in two parts, 55647 and 1728, that added together give a palindrome (57375).

The spelling of 556471728 in words is "five hundred fifty-six million, four hundred seventy-one thousand, seven hundred twenty-eight".