28728728587164 has 48 divisors (see below), whose sum is σ = 68134979394720. Its totient is φ = 9418928144640.

The previous prime is 28728728587159. The next prime is 28728728587177. The reversal of 28728728587164 is 46178582782782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20875222 + ... + 22208834.

It is an arithmetic number, because the mean of its divisors is an integer number (1419478737390).

Almost surely, 2^{28728728587164} is an apocalyptic number.

It is an amenable number.

28728728587164 is an abundant number, since it is smaller than the sum of its proper divisors (39406250807556).

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

28728728587164 is a wasteful number, since it uses less digits than its factorization.

28728728587164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363110 (or 1363108 counting only the distinct ones).

The product of its digits is 1348730880, while the sum is 75.

The spelling of 28728728587164 in words is "twenty-eight trillion, seven hundred twenty-eight billion, seven hundred twenty-eight million, five hundred eighty-seven thousand, one hundred sixty-four".