721366032 has 80 divisors (see below), whose sum is σ = 2036869632. Its totient is φ = 219002880.

The previous prime is 721366021. The next prime is 721366057. The reversal of 721366032 is 230663127.

721366032 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11038 + ... + 39554.

Almost surely, 2^721366032 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 721366032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1018434816).

721366032 is an abundant number, since it is smaller than the sum of its proper divisors (1315503600).

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

721366032 is a wasteful number, since it uses less digits than its factorization.

721366032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28576 (or 28570 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 721366032 is about 26858.2581713707. The cubic root of 721366032 is about 896.8474192039.

The spelling of 721366032 in words is "seven hundred twenty-one million, three hundred sixty-six thousand, thirty-two".