721582332 has 12 divisors (see below), whose sum is σ = 1683692136. Its totient is φ = 240527440.

The previous prime is 721582327. The next prime is 721582339. The reversal of 721582332 is 233285127.

721582332 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 721582293 and 721582302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721582339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30065919 + ... + 30065942.

It is an arithmetic number, because the mean of its divisors is an integer number (140307678).

Almost surely, 2^721582332 is an apocalyptic number.

It is an amenable number.

721582332 is an abundant number, since it is smaller than the sum of its proper divisors (962109804).

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

721582332 is a wasteful number, since it uses less digits than its factorization.

721582332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60131868 (or 60131866 counting only the distinct ones).

The product of its digits is 20160, while the sum is 33.

The square root of 721582332 is about 26862.2845640500. The cubic root of 721582332 is about 896.9370494805.

The spelling of 721582332 in words is "seven hundred twenty-one million, five hundred eighty-two thousand, three hundred thirty-two".