722988 has 72 divisors (see below), whose sum is σ = 2213120. Its totient is φ = 194400.

The previous prime is 722983. The next prime is 723029. The reversal of 722988 is 889227.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (722983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4713 + ... + 4863.

2⁷²²⁹⁸⁸ 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 722988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1106560).

722988 is an abundant number, since it is smaller than the sum of its proper divisors (1490132).

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

722988 is a wasteful number, since it uses less digits than its factorization.

722988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187 (or 182 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 722988 is about 850.2870103677. The cubic root of 722988 is about 89.7519093435.

The spelling of 722988 in words is "seven hundred twenty-two thousand, nine hundred eighty-eight".