728710722 has 32 divisors (see below), whose sum is σ = 1621244160. Its totient is φ = 242620560.

The previous prime is 728710709. The next prime is 728710739. The reversal of 728710722 is 227017827.

It is a super-2 number, since 2×728710722² = 1062038632715522568, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41788 + ... + 56600.

It is an arithmetic number, because the mean of its divisors is an integer number (50663880).

Almost surely, 2^728710722 is an apocalyptic number.

728710722 is an abundant number, since it is smaller than the sum of its proper divisors (892533438).

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

728710722 is a wasteful number, since it uses less digits than its factorization.

728710722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15735 (or 15729 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 36.

The square root of 728710722 is about 26994.6424684603. The cubic root of 728710722 is about 899.8809398059.

The spelling of 728710722 in words is "seven hundred twenty-eight million, seven hundred ten thousand, seven hundred twenty-two".