722157072 has 160 divisors (see below), whose sum is σ = 2375681280. Its totient is φ = 183859200.

The previous prime is 722157071. The next prime is 722157077. The reversal of 722157072 is 270751227.

It is a super-2 number, since 2×722157072² = 1043021673279226368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (722157071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123822 + ... + 129522.

It is an arithmetic number, because the mean of its divisors is an integer number (14848008).

Almost surely, 2^722157072 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 722157072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1187840640).

722157072 is an abundant number, since it is smaller than the sum of its proper divisors (1653524208).

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

722157072 is a wasteful number, since it uses less digits than its factorization.

722157072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5761 (or 5755 counting only the distinct ones).

The product of its (nonzero) digits is 13720, while the sum is 33.

The square root of 722157072 is about 26872.9803334130. The cubic root of 722157072 is about 897.1751229342.

The spelling of 722157072 in words is "seven hundred twenty-two million, one hundred fifty-seven thousand, seventy-two".