728724708 has 72 divisors (see below), whose sum is σ = 1994062560. Its totient is φ = 230111280.

The previous prime is 728724701. The next prime is 728724721. The reversal of 728724708 is 807427827.

It is not an unprimeable number, because it can be changed into a prime (728724701) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29643 + ... + 48333.

Almost surely, 2^728724708 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 728724708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (997031280).

728724708 is an abundant number, since it is smaller than the sum of its proper divisors (1265337852).

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

728724708 is a wasteful number, since it uses less digits than its factorization.

728724708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18742 (or 18715 counting only the distinct ones).

The product of its (nonzero) digits is 351232, while the sum is 45.

The square root of 728724708 is about 26994.9015186201. The cubic root of 728724708 is about 899.8866968477.

The spelling of 728724708 in words is "seven hundred twenty-eight million, seven hundred twenty-four thousand, seven hundred eight".