722057328 has 100 divisors (see below), whose sum is σ = 2106291528. Its totient is φ = 238792320.

The previous prime is 722057321. The next prime is 722057351. The reversal of 722057328 is 823750227.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 722057292 and 722057301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722057321) 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 19 ways as a sum of consecutive naturals, for example, 167650 + ... + 171902.

Almost surely, 2^722057328 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 722057328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1053145764).

722057328 is an abundant number, since it is smaller than the sum of its proper divisors (1384234200).

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

722057328 is a wasteful number, since it uses less digits than its factorization.

722057328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4404 (or 4389 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 722057328 is about 26871.1244275337. The cubic root of 722057328 is about 897.1338152283.

The spelling of 722057328 in words is "seven hundred twenty-two million, fifty-seven thousand, three hundred twenty-eight".