722749456 has 135 divisors (see below), whose sum is σ = 1702926813. Its totient is φ = 296799360.

The previous prime is 722749451. The next prime is 722749477. The reversal of 722749456 is 654947227.

It is a happy number.

The square root of 722749456 is 26884.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 106915600 + 615833856 = 10340^2 + 24816^2 .

It is a super-2 number, since 2×722749456² = 1044733552296591872, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722749451) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 15377625 + ... + 15377671.

Almost surely, 2^722749456 is an apocalyptic number.

722749456 is the 26884-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 722749456

722749456 is an abundant number, since it is smaller than the sum of its proper divisors (980177357).

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

722749456 is a wasteful number, since it uses less digits than its factorization.

722749456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 73 counting only the distinct ones).

The product of its digits is 846720, while the sum is 46.

The cubic root of 722749456 is about 897.4203728727.

The spelling of 722749456 in words is "seven hundred twenty-two million, seven hundred forty-nine thousand, four hundred fifty-six".