28179431800 has 72 divisors (see below), whose sum is σ = 70944722640. Its totient is φ = 10404700800.

The previous prime is 28179431783. The next prime is 28179431803. The reversal of 28179431800 is 813497182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28179431803) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 383056 + ... + 450655.

It is an arithmetic number, because the mean of its divisors is an integer number (985343370).

Almost surely, 2^28179431800 is an apocalyptic number.

28179431800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28179431800 is an abundant number, since it is smaller than the sum of its proper divisors (42765290840).

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

28179431800 is a wasteful number, since it uses less digits than its factorization.

28179431800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833753 (or 833731 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 43.

The spelling of 28179431800 in words is "twenty-eight billion, one hundred seventy-nine million, four hundred thirty-one thousand, eight hundred".