721964152 has 64 divisors (see below), whose sum is σ = 1704890880. Its totient is φ = 278957952.

The previous prime is 721964149. The next prime is 721964189. The reversal of 721964152 is 251469127.

It is a congruent number.

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, 19773 + ... + 42835.

It is an arithmetic number, because the mean of its divisors is an integer number (26638920).

Almost surely, 2^721964152 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 721964152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (852445440).

721964152 is an abundant number, since it is smaller than the sum of its proper divisors (982926728).

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

721964152 is a wasteful number, since it uses less digits than its factorization.

721964152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23132 (or 23128 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The square root of 721964152 is about 26869.3906146008. The cubic root of 721964152 is about 897.0952241391.

The spelling of 721964152 in words is "seven hundred twenty-one million, nine hundred sixty-four thousand, one hundred fifty-two".