721932464 has 120 divisors (see below), whose sum is σ = 1659227136. Its totient is φ = 303177600.

The previous prime is 721932457. The next prime is 721932481. The reversal of 721932464 is 464239127.

It is a super-2 number, since 2×721932464² = 1042372965154222592, which contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 1380107 + ... + 1380629.

Almost surely, 2^721932464 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 721932464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (829613568).

721932464 is an abundant number, since it is smaller than the sum of its proper divisors (937294672).

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

721932464 is a wasteful number, since it uses less digits than its factorization.

721932464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607 (or 590 counting only the distinct ones).

The product of its digits is 72576, while the sum is 38.

The square root of 721932464 is about 26868.8009408682. The cubic root of 721932464 is about 897.0820990325.

The spelling of 721932464 in words is "seven hundred twenty-one million, nine hundred thirty-two thousand, four hundred sixty-four".