561988328 has 32 divisors (see below), whose sum is σ = 1176262560. Its totient is φ = 249506880.

The previous prime is 561988307. The next prime is 561988337. The reversal of 561988328 is 823889165.

561988328 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70475 + ... + 78042.

It is an arithmetic number, because the mean of its divisors is an integer number (36758205).

Almost surely, 2^561988328 is an apocalyptic number.

It is an amenable number.

561988328 is an abundant number, since it is smaller than the sum of its proper divisors (614274232).

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

561988328 is a wasteful number, since it uses less digits than its factorization.

561988328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148577 (or 148573 counting only the distinct ones).

The product of its digits is 829440, while the sum is 50.

The square root of 561988328 is about 23706.2930041793. The cubic root of 561988328 is about 825.2314394447.

It can be divided in two parts, 561 and 988328, that added together give a palindrome (988889).

The spelling of 561988328 in words is "five hundred sixty-one million, nine hundred eighty-eight thousand, three hundred twenty-eight".