28188494700 has 72 divisors (see below), whose sum is σ = 81659981760. Its totient is φ = 7507598400.

The previous prime is 28188494693. The next prime is 28188494713. The reversal of 28188494700 is 749488182.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 185371 + ... + 301229.

Almost surely, 2^28188494700 is an apocalyptic number.

28188494700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28188494700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40829990880).

28188494700 is an abundant number, since it is smaller than the sum of its proper divisors (53471487060).

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

28188494700 is a wasteful number, since it uses less digits than its factorization.

28188494700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116687 (or 116680 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 51.

The spelling of 28188494700 in words is "twenty-eight billion, one hundred eighty-eight million, four hundred ninety-four thousand, seven hundred".