28133506880 has 112 divisors (see below), whose sum is σ = 69237295104. Its totient is φ = 10877276160.

The previous prime is 28133506879. The next prime is 28133506901. The reversal of 28133506880 is 8860533182.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14115164 + ... + 14117156.

Almost surely, 2^28133506880 is an apocalyptic number.

28133506880 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 28133506880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34618647552).

28133506880 is an abundant number, since it is smaller than the sum of its proper divisors (41103788224).

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

28133506880 is a wasteful number, since it uses less digits than its factorization.

28133506880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3464 (or 3454 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 44.

The spelling of 28133506880 in words is "twenty-eight billion, one hundred thirty-three million, five hundred six thousand, eight hundred eighty".