722999256 has 128 divisors (see below), whose sum is σ = 2203200000. Its totient is φ = 193001472.

The previous prime is 722999161. The next prime is 722999257. The reversal of 722999256 is 652999227.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 722999199 and 722999208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722999257) 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, 424695 + ... + 426393.

It is an arithmetic number, because the mean of its divisors is an integer number (17212500).

Almost surely, 2^722999256 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 722999256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1101600000).

722999256 is an abundant number, since it is smaller than the sum of its proper divisors (1480200744).

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

722999256 is a wasteful number, since it uses less digits than its factorization.

722999256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1881 (or 1877 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 51.

The square root of 722999256 is about 26888.6454846651. The cubic root of 722999256 is about 897.5237511528.

The spelling of 722999256 in words is "seven hundred twenty-two million, nine hundred ninety-nine thousand, two hundred fifty-six".