28160221518 has 192 divisors, whose sum is σ = 75658302720. Its totient is φ = 7442150400.

The previous prime is 28160221469. The next prime is 28160221541. The reversal of 28160221518 is 81512206182.

28160221518 is a `hidden beast` number, since 2 + 81 + 60 + 2 + 2 + 1 + 518 = 666.

It is a congruent number.

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 95 ways as a sum of consecutive naturals, for example, 29000773 + ... + 29001743.

It is an arithmetic number, because the mean of its divisors is an integer number (394053660).

Almost surely, 2^28160221518 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28160221518, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37829151360).

28160221518 is an abundant number, since it is smaller than the sum of its proper divisors (47498081202).

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

28160221518 is a wasteful number, since it uses less digits than its factorization.

28160221518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1615 (or 1612 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 36.

The spelling of 28160221518 in words is "twenty-eight billion, one hundred sixty million, two hundred twenty-one thousand, five hundred eighteen".