722394136 has 32 divisors (see below), whose sum is σ = 1456128000. Its totient is φ = 334902816.

The previous prime is 722394133. The next prime is 722394139. The reversal of 722394136 is 631493227.

It is an interprime number because it is at equal distance from previous prime (722394133) and next prime (722394139).

It is a junction number, because it is equal to n+sod(n) for n = 722394095 and 722394104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722394133) 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, 43416 + ... + 57703.

It is an arithmetic number, because the mean of its divisors is an integer number (45504000).

Almost surely, 2^722394136 is an apocalyptic number.

722394136 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

722394136 is an abundant number, since it is smaller than the sum of its proper divisors (733733864).

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

722394136 is a wasteful number, since it uses less digits than its factorization.

722394136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101191 (or 101187 counting only the distinct ones).

The product of its digits is 54432, while the sum is 37.

The square root of 722394136 is about 26877.3907959832. The cubic root of 722394136 is about 897.2732847066.

Subtracting from 722394136 its reverse (631493227), we obtain a palindrome (90900909).

The spelling of 722394136 in words is "seven hundred twenty-two million, three hundred ninety-four thousand, one hundred thirty-six".