721882 has 8 divisors (see below), whose sum is σ = 1237536. Its totient is φ = 309372.

The previous prime is 721859. The next prime is 721883. The reversal of 721882 is 288127.

721882 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×721882² = 1042227243848, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 721882.

It is not an unprimeable number, because it can be changed into a prime (721883) by changing a digit.

721882 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25768 + ... + 25795.

It is an arithmetic number, because the mean of its divisors is an integer number (154692).

2⁷²¹⁸⁸² is an apocalyptic number.

721882 is a deficient number, since it is larger than the sum of its proper divisors (515654).

721882 is a wasteful number, since it uses less digits than its factorization.

721882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51572.

The product of its digits is 1792, while the sum is 28.

The square root of 721882 is about 849.6363928175. The cubic root of 721882 is about 89.7061196151.

The spelling of 721882 in words is "seven hundred twenty-one thousand, eight hundred eighty-two".