722529728 has 28 divisors (see below), whose sum is σ = 1496110800. Its totient is φ = 345556992.

The previous prime is 722529727. The next prime is 722529779. The reversal of 722529728 is 827925227.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722529727) 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, 243953 + ... + 246896.

Almost surely, 2^722529728 is an apocalyptic number.

It is an amenable number.

722529728 is an abundant number, since it is smaller than the sum of its proper divisors (773581072).

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

722529728 is a wasteful number, since it uses less digits than its factorization.

722529728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490884 (or 490874 counting only the distinct ones).

The product of its digits is 282240, while the sum is 44.

The square root of 722529728 is about 26879.9130950976. The cubic root of 722529728 is about 897.3294200220.

The spelling of 722529728 in words is "seven hundred twenty-two million, five hundred twenty-nine thousand, seven hundred twenty-eight".