722728255720 has 128 divisors (see below), whose sum is σ = 1722990528000. Its totient is φ = 272289447936.

The previous prime is 722728255619. The next prime is 722728255723. The reversal of 722728255720 is 27552827227.

It is a super-2 number, since 2×722728255720² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (722728255723) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17738412 + ... + 17779108.

It is an arithmetic number, because the mean of its divisors is an integer number (13460863500).

Almost surely, 2^722728255720 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 722728255720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (861495264000).

722728255720 is an abundant number, since it is smaller than the sum of its proper divisors (1000262272280).

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

722728255720 is a wasteful number, since it uses less digits than its factorization.

722728255720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41027 (or 41023 counting only the distinct ones).

The product of its (nonzero) digits is 2195200, while the sum is 49.

The spelling of 722728255720 in words is "seven hundred twenty-two billion, seven hundred twenty-eight million, two hundred fifty-five thousand, seven hundred twenty".