728268155660 has 24 divisors (see below), whose sum is σ = 1529588550336. Its totient is φ = 291264324480.

The previous prime is 728268155653. The next prime is 728268155677. The reversal of 728268155660 is 66551862827.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 728268155596 and 728268155605.

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, 2544356 + ... + 2816075.

It is an arithmetic number, because the mean of its divisors is an integer number (63732856264).

Almost surely, 2^728268155660 is an apocalyptic number.

It is an amenable number.

728268155660 is an abundant number, since it is smaller than the sum of its proper divisors (801320394676).

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

728268155660 is a wasteful number, since it uses less digits than its factorization.

728268155660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5367233 (or 5367231 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 56.

The spelling of 728268155660 in words is "seven hundred twenty-eight billion, two hundred sixty-eight million, one hundred fifty-five thousand, six hundred sixty".