721675232 has 48 divisors (see below), whose sum is σ = 1522698912. Its totient is φ = 335808000.

The previous prime is 721675231. The next prime is 721675259. The reversal of 721675232 is 232576127.

It is a junction number, because it is equal to n+sod(n) for n = 721675192 and 721675201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721675231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13982 + ... + 40482.

It is an arithmetic number, because the mean of its divisors is an integer number (31722894).

Almost surely, 2^721675232 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 721675232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (761349456).

721675232 is an abundant number, since it is smaller than the sum of its proper divisors (801023680).

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

721675232 is a wasteful number, since it uses less digits than its factorization.

721675232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26571 (or 26563 counting only the distinct ones).

The product of its digits is 35280, while the sum is 35.

The square root of 721675232 is about 26864.0136986266. The cubic root of 721675232 is about 896.9755398336.

The spelling of 721675232 in words is "seven hundred twenty-one million, six hundred seventy-five thousand, two hundred thirty-two".