28133173332 has 144 divisors (see below), whose sum is σ = 81373324032. Its totient is φ = 8118109440.

The previous prime is 28133173297. The next prime is 28133173361. The reversal of 28133173332 is 23337133182.

28133173332 is a `hidden beast` number, since 2 + 8 + 1 + 3 + 317 + 3 + 332 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 668218 + ... + 709070.

It is an arithmetic number, because the mean of its divisors is an integer number (565092528).

Almost surely, 2^28133173332 is an apocalyptic number.

28133173332 is a gapful number since it is divisible by the number (22) 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 28133173332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40686662016).

28133173332 is an abundant number, since it is smaller than the sum of its proper divisors (53240150700).

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

28133173332 is a wasteful number, since it uses less digits than its factorization.

28133173332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40958 (or 40953 counting only the distinct ones).

The product of its digits is 54432, while the sum is 36.

The spelling of 28133173332 in words is "twenty-eight billion, one hundred thirty-three million, one hundred seventy-three thousand, three hundred thirty-two".