28197388032 has 72 divisors (see below), whose sum is σ = 81868577280. Its totient is φ = 8544660480.

The previous prime is 28197388027. The next prime is 28197388033. The reversal of 28197388032 is 23088379182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28197388033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1660432 + ... + 1677327.

Almost surely, 2^28197388032 is an apocalyptic number.

28197388032 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28197388032 is an abundant number, since it is smaller than the sum of its proper divisors (53671189248).

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

28197388032 is a wasteful number, since it uses less digits than its factorization.

28197388032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3337789 (or 3337775 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 51.

The spelling of 28197388032 in words is "twenty-eight billion, one hundred ninety-seven million, three hundred eighty-eight thousand, thirty-two".