722015660 has 12 divisors (see below), whose sum is σ = 1516232928. Its totient is φ = 288806256.

The previous prime is 722015659. The next prime is 722015663. The reversal of 722015660 is 66510227.

It is a super-2 number, since 2×722015660² = 1042613226570471200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (722015663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18050372 + ... + 18050411.

It is an arithmetic number, because the mean of its divisors is an integer number (126352744).

Almost surely, 2^722015660 is an apocalyptic number.

It is an amenable number.

722015660 is an abundant number, since it is smaller than the sum of its proper divisors (794217268).

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

722015660 is a wasteful number, since it uses less digits than its factorization.

722015660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36100792 (or 36100790 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 722015660 is about 26870.3490859349. The cubic root of 722015660 is about 897.1165578309.

Adding to 722015660 its reverse (66510227), we get a palindrome (788525887).

The spelling of 722015660 in words is "seven hundred twenty-two million, fifteen thousand, six hundred sixty".