728079972 has 48 divisors (see below), whose sum is σ = 1713243840. Its totient is φ = 240648192.

The previous prime is 728079971. The next prime is 728079977. The reversal of 728079972 is 279970827.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (728079971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 946404 + ... + 947172.

It is an arithmetic number, because the mean of its divisors is an integer number (35692580).

Almost surely, 2^728079972 is an apocalyptic number.

It is an amenable number.

728079972 is an abundant number, since it is smaller than the sum of its proper divisors (985163868).

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

728079972 is a wasteful number, since it uses less digits than its factorization.

728079972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340 (or 1338 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 51.

The square root of 728079972 is about 26982.9570655256. The cubic root of 728079972 is about 899.6212282678.

The spelling of 728079972 in words is "seven hundred twenty-eight million, seventy-nine thousand, nine hundred seventy-two".