728607980 has 24 divisors (see below), whose sum is σ = 1532927760. Its totient is φ = 290900160.

The previous prime is 728607967. The next prime is 728608019. The reversal of 728607980 is 89706827.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22850 + ... + 44489.

It is an arithmetic number, because the mean of its divisors is an integer number (63871990).

Almost surely, 2^728607980 is an apocalyptic number.

It is an amenable number.

728607980 is an abundant number, since it is smaller than the sum of its proper divisors (804319780).

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

728607980 is a wasteful number, since it uses less digits than its factorization.

728607980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67889 (or 67887 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 47.

The square root of 728607980 is about 26992.7393941408. The cubic root of 728607980 is about 899.8386459709.

The spelling of 728607980 in words is "seven hundred twenty-eight million, six hundred seven thousand, nine hundred eighty".