722128288 has 72 divisors (see below), whose sum is σ = 1740916800. Its totient is φ = 293182848.

The previous prime is 722128243. The next prime is 722128313. The reversal of 722128288 is 882821227.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 722128288.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 17673 + ... + 41911.

It is an arithmetic number, because the mean of its divisors is an integer number (24179400).

Almost surely, 2^722128288 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 722128288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (870458400).

722128288 is an abundant number, since it is smaller than the sum of its proper divisors (1018788512).

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

722128288 is a wasteful number, since it uses less digits than its factorization.

722128288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24282 (or 24267 counting only the distinct ones).

The product of its digits is 57344, while the sum is 40.

The square root of 722128288 is about 26872.4447715499. Note that the first 3 decimals coincide. The cubic root of 722128288 is about 897.1632027981.

The spelling of 722128288 in words is "seven hundred twenty-two million, one hundred twenty-eight thousand, two hundred eighty-eight".