722773836 has 144 divisors (see below), whose sum is σ = 2024174880. Its totient is φ = 216483840.

The previous prime is 722773817. The next prime is 722773841. The reversal of 722773836 is 638377227.

It is a junction number, because it is equal to n+sod(n) for n = 722773791 and 722773800.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1335726 + ... + 1336266.

It is an arithmetic number, because the mean of its divisors is an integer number (14056770).

Almost surely, 2^722773836 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 722773836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1012087440).

722773836 is an abundant number, since it is smaller than the sum of its proper divisors (1301401044).

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

722773836 is a wasteful number, since it uses less digits than its factorization.

722773836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664 (or 659 counting only the distinct ones).

The product of its digits is 592704, while the sum is 45.

The square root of 722773836 is about 26884.4534257254. The cubic root of 722773836 is about 897.4304634430.

The spelling of 722773836 in words is "seven hundred twenty-two million, seven hundred seventy-three thousand, eight hundred thirty-six".