722776728 has 16 divisors (see below), whose sum is σ = 1806941880. Its totient is φ = 240925568.

The previous prime is 722776721. The next prime is 722776793. The reversal of 722776728 is 827677227.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722776721) 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, 15057825 + ... + 15057872.

Almost surely, 2^722776728 is an apocalyptic number.

It is an amenable number.

722776728 is an abundant number, since it is smaller than the sum of its proper divisors (1084165152).

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

722776728 is a wasteful number, since it uses less digits than its factorization.

722776728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30115706 (or 30115702 counting only the distinct ones).

The product of its digits is 921984, while the sum is 48.

The square root of 722776728 is about 26884.5072114034. The cubic root of 722776728 is about 897.4316603898.

The spelling of 722776728 in words is "seven hundred twenty-two million, seven hundred seventy-six thousand, seven hundred twenty-eight".