722531136 has 112 divisors (see below), whose sum is σ = 1985637888. Its totient is φ = 231628800.

The previous prime is 722531129. The next prime is 722531191. The reversal of 722531136 is 631135227.

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, 1386556 + ... + 1387076.

Almost surely, 2^722531136 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 722531136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (992818944).

722531136 is an abundant number, since it is smaller than the sum of its proper divisors (1263106752).

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

722531136 is a wasteful number, since it uses less digits than its factorization.

722531136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800 (or 790 counting only the distinct ones).

The product of its digits is 7560, while the sum is 30.

The square root of 722531136 is about 26879.9392856457. The cubic root of 722531136 is about 897.3300028996.

The spelling of 722531136 in words is "seven hundred twenty-two million, five hundred thirty-one thousand, one hundred thirty-six".