556873728 has 96 divisors (see below), whose sum is σ = 1494838800. Its totient is φ = 184352768.

The previous prime is 556873721. The next prime is 556873729. The reversal of 556873728 is 827378655.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556873721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1431358 + ... + 1431746.

Almost surely, 2^556873728 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 556873728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (747419400).

556873728 is an abundant number, since it is smaller than the sum of its proper divisors (937965072).

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

556873728 is a wasteful number, since it uses less digits than its factorization.

556873728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647 (or 627 counting only the distinct ones).

The product of its digits is 2822400, while the sum is 51.

The square root of 556873728 is about 23598.1721326038. The cubic root of 556873728 is about 822.7203564515.

The spelling of 556873728 in words is "five hundred fifty-six million, eight hundred seventy-three thousand, seven hundred twenty-eight".