728337985536 has 416 divisors, whose sum is σ = 2275652190208. Its totient is φ = 202887659520.

The previous prime is 728337985511. The next prime is 728337985549. The reversal of 728337985536 is 635589733827.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 666365406 + ... + 666366498.

Almost surely, 2^728337985536 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 728337985536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1137826095104).

728337985536 is an abundant number, since it is smaller than the sum of its proper divisors (1547314204672).

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

728337985536 is a wasteful number, since it uses less digits than its factorization.

728337985536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315 (or 1293 counting only the distinct ones).

The product of its digits is 228614400, while the sum is 66.

The spelling of 728337985536 in words is "seven hundred twenty-eight billion, three hundred thirty-seven million, nine hundred eighty-five thousand, five hundred thirty-six".