722216636 has 12 divisors (see below), whose sum is σ = 1276150512. Its totient is φ = 357602208.

The previous prime is 722216633. The next prime is 722216683. The reversal of 722216636 is 636612227.

It is a junction number, because it is equal to n+sod(n) for n = 722216596 and 722216605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722216633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 876065 + ... + 876888.

It is an arithmetic number, because the mean of its divisors is an integer number (106345876).

Almost surely, 2^722216636 is an apocalyptic number.

It is an amenable number.

722216636 is a deficient number, since it is larger than the sum of its proper divisors (553933876).

722216636 is a wasteful number, since it uses less digits than its factorization.

722216636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1753060 (or 1753058 counting only the distinct ones).

The product of its digits is 36288, while the sum is 35.

The square root of 722216636 is about 26874.0885612889. The cubic root of 722216636 is about 897.1997887915.

The spelling of 722216636 in words is "seven hundred twenty-two million, two hundred sixteen thousand, six hundred thirty-six".