572561730 has 128 divisors (see below), whose sum is σ = 1656345600. Its totient is φ = 139905792.

The previous prime is 572561707. The next prime is 572561741. The reversal of 572561730 is 37165275.

572561730 is a `hidden beast` number, since 5 + 7 + 2 + 5 + 617 + 30 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 550551 + ... + 551589.

It is an arithmetic number, because the mean of its divisors is an integer number (12940200).

Almost surely, 2^572561730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 572561730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (828172800).

572561730 is an abundant number, since it is smaller than the sum of its proper divisors (1083783870).

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

572561730 is a wasteful number, since it uses less digits than its factorization.

572561730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225 (or 1219 counting only the distinct ones).

The product of its (nonzero) digits is 44100, while the sum is 36.

The square root of 572561730 is about 23928.2621600483. The cubic root of 572561730 is about 830.3746941318.

The spelling of 572561730 in words is "five hundred seventy-two million, five hundred sixty-one thousand, seven hundred thirty".