722143656 has 96 divisors (see below), whose sum is σ = 2146140360. Its totient is φ = 217990656.

The previous prime is 722143613. The next prime is 722143691. The reversal of 722143656 is 656341227.

It can be written as a sum of positive squares in 4 ways, for example, as 450882756 + 271260900 = 21234^2 + 16470^2 .

It is a super-3 number, since 3×722143656³ (a number of 28 digits) contains 333 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 722143656.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42330 + ... + 56886.

Almost surely, 2^722143656 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 722143656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1073070180).

722143656 is an abundant number, since it is smaller than the sum of its proper divisors (1423996704).

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

722143656 is a wasteful number, since it uses less digits than its factorization.

722143656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14635 (or 14628 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 722143656 is about 26872.7307134947. The cubic root of 722143656 is about 897.1695670903.

The spelling of 722143656 in words is "seven hundred twenty-two million, one hundred forty-three thousand, six hundred fifty-six".