28821633192 has 144 divisors (see below), whose sum is σ = 88427289600. Its totient is φ = 8733653280.

The previous prime is 28821633187. The next prime is 28821633221. The reversal of 28821633192 is 29133612882.

28821633192 is a `hidden beast` number, since 2 + 8 + 8 + 2 + 1 + 633 + 1 + 9 + 2 = 666.

It is a super-2 number, since 2×28821633192² (a number of 22 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 552409 + ... + 602327.

It is an arithmetic number, because the mean of its divisors is an integer number (614078400).

Almost surely, 2^28821633192 is an apocalyptic number.

28821633192 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 28821633192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44213644800).

28821633192 is an abundant number, since it is smaller than the sum of its proper divisors (59605656408).

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

28821633192 is an equidigital number, since it uses as much as digits as its factorization.

28821633192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49960 (or 49935 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The spelling of 28821633192 in words is "twenty-eight billion, eight hundred twenty-one million, six hundred thirty-three thousand, one hundred ninety-two".