722116864 has 72 divisors (see below), whose sum is σ = 1692006848. Its totient is φ = 301086720.

The previous prime is 722116859. The next prime is 722116867. The reversal of 722116864 is 468611227.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (722116867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60859 + ... + 71749.

Almost surely, 2^722116864 is an apocalyptic number.

722116864 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 722116864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (846003424).

722116864 is an abundant number, since it is smaller than the sum of its proper divisors (969889984).

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

722116864 is a wasteful number, since it uses less digits than its factorization.

722116864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10951 (or 10937 counting only the distinct ones).

The product of its digits is 32256, while the sum is 37.

The square root of 722116864 is about 26872.2322109645. The cubic root of 722116864 is about 897.1584717613.

The spelling of 722116864 in words is "seven hundred twenty-two million, one hundred sixteen thousand, eight hundred sixty-four".