28144445168 has 100 divisors (see below), whose sum is σ = 65669243328. Its totient is φ = 11672317440.

The previous prime is 28144445159. The next prime is 28144445207. The reversal of 28144445168 is 86154444182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1179080 + ... + 1202712.

Almost surely, 2^28144445168 is an apocalyptic number.

28144445168 is a gapful number since it is divisible by the number (28) 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 28144445168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32834621664).

28144445168 is an abundant number, since it is smaller than the sum of its proper divisors (37524798160).

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

28144445168 is an equidigital number, since it uses as much as digits as its factorization.

28144445168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23700 (or 23673 counting only the distinct ones).

The product of its digits is 983040, while the sum is 47.

The spelling of 28144445168 in words is "twenty-eight billion, one hundred forty-four million, four hundred forty-five thousand, one hundred sixty-eight".