28727656500 has 48 divisors (see below), whose sum is σ = 83654940096. Its totient is φ = 7660708000.

The previous prime is 28727656483. The next prime is 28727656511. The reversal of 28727656500 is 565672782.

It is a self number, because there is not a number n which added to its sum of digits gives 28727656500.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9574386 + ... + 9577385.

It is an arithmetic number, because the mean of its divisors is an integer number (1742811252).

Almost surely, 2^28727656500 is an apocalyptic number.

28727656500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28727656500 is an abundant number, since it is smaller than the sum of its proper divisors (54927283596).

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

28727656500 is a wasteful number, since it uses less digits than its factorization.

28727656500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19151793 (or 19151781 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 48.

The spelling of 28727656500 in words is "twenty-eight billion, seven hundred twenty-seven million, six hundred fifty-six thousand, five hundred".