744721560 has 128 divisors (see below), whose sum is σ = 2708121600. Its totient is φ = 180535680.

The previous prime is 744721559. The next prime is 744721589. The reversal of 744721560 is 65127447.

744721560 is a `hidden beast` number, since 74 + 4 + 7 + 21 + 560 = 666.

It is a super-2 number, since 2×744721560² = 1109220403857667200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19464 + ... + 43223.

It is an arithmetic number, because the mean of its divisors is an integer number (21157200).

Almost surely, 2^744721560 is an apocalyptic number.

It is an amenable number.

744721560 is an abundant number, since it is smaller than the sum of its proper divisors (1963400040).

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

744721560 is a wasteful number, since it uses less digits than its factorization.

744721560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62718 (or 62708 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 744721560 is about 27289.5870250907. The cubic root of 744721560 is about 906.4238182015.

The spelling of 744721560 in words is "seven hundred forty-four million, seven hundred twenty-one thousand, five hundred sixty".