561953928 has 64 divisors (see below), whose sum is σ = 1476509760. Its totient is φ = 178004736.

The previous prime is 561953893. The next prime is 561953981. The reversal of 561953928 is 829359165.

It is a happy number.

561953928 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 15 ways as a sum of consecutive naturals, for example, 30826 + ... + 45542.

It is an arithmetic number, because the mean of its divisors is an integer number (23070465).

Almost surely, 2^561953928 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 561953928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (738254880).

561953928 is an abundant number, since it is smaller than the sum of its proper divisors (914555832).

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

561953928 is a wasteful number, since it uses less digits than its factorization.

561953928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14806 (or 14802 counting only the distinct ones).

The product of its digits is 583200, while the sum is 48.

The square root of 561953928 is about 23705.5674473319. The cubic root of 561953928 is about 825.2146012891.

The spelling of 561953928 in words is "five hundred sixty-one million, nine hundred fifty-three thousand, nine hundred twenty-eight".