722073456 has 90 divisors (see below), whose sum is σ = 2188280328. Its totient is φ = 222168960.

The previous prime is 722073449. The next prime is 722073481. The reversal of 722073456 is 654370227.

It is a happy number.

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 722073456.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9501 + ... + 39171.

Almost surely, 2^722073456 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 722073456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1094140164).

722073456 is an abundant number, since it is smaller than the sum of its proper divisors (1466206872).

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

722073456 is a wasteful number, since it uses less digits than its factorization.

722073456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29711 (or 29689 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 36.

The square root of 722073456 is about 26871.4245249484. The cubic root of 722073456 is about 897.1404946917.

The spelling of 722073456 in words is "seven hundred twenty-two million, seventy-three thousand, four hundred fifty-six".