728911853280 has 864 divisors, whose sum is σ = 2880509433984. Its totient is φ = 166278168576.

The previous prime is 728911853279. The next prime is 728911853323. The reversal of 728911853280 is 82358119827.

728911853280 is a `hidden beast` number, since 7 + 2 + 8 + 91 + 18 + 532 + 8 + 0 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1986135657 + ... + 1986136023.

It is an arithmetic number, because the mean of its divisors is an integer number (3333922956).

Almost surely, 2^728911853280 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 728911853280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1440254716992).

728911853280 is an abundant number, since it is smaller than the sum of its proper divisors (2151597580704).

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

728911853280 is a wasteful number, since it uses less digits than its factorization.

728911853280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576 (or 486 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 54.

The spelling of 728911853280 in words is "seven hundred twenty-eight billion, nine hundred eleven million, eight hundred fifty-three thousand, two hundred eighty".