561908724 has 48 divisors (see below), whose sum is σ = 1413467328. Its totient is φ = 172712448.

The previous prime is 561908723. The next prime is 561908729. The reversal of 561908724 is 427809165.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561908723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 276199 + ... + 278225.

It is an arithmetic number, because the mean of its divisors is an integer number (29447236).

Almost surely, 2^561908724 is an apocalyptic number.

It is an amenable number.

561908724 is an abundant number, since it is smaller than the sum of its proper divisors (851558604).

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

561908724 is a wasteful number, since it uses less digits than its factorization.

561908724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3824 (or 3822 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 561908724 is about 23704.6139812485. The cubic root of 561908724 is about 825.1924737331.

The spelling of 561908724 in words is "five hundred sixty-one million, nine hundred eight thousand, seven hundred twenty-four".