572721440 has 24 divisors (see below), whose sum is σ = 1353054780. Its totient is φ = 229088512.

The previous prime is 572721439. The next prime is 572721469. The reversal of 572721440 is 44127275.

It can be written as a sum of positive squares in 2 ways, for example, as 566630416 + 6091024 = 23804^2 + 2468^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 572721397 and 572721406.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1789595 + ... + 1789914.

Almost surely, 2^572721440 is an apocalyptic number.

It is an amenable number.

572721440 is an abundant number, since it is smaller than the sum of its proper divisors (780333340).

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

572721440 is a wasteful number, since it uses less digits than its factorization.

572721440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3579524 (or 3579516 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 32.

The square root of 572721440 is about 23931.5991943706. The cubic root of 572721440 is about 830.4518950148.

The spelling of 572721440 in words is "five hundred seventy-two million, seven hundred twenty-one thousand, four hundred forty".