28110841921 has 8 divisors (see below), whose sum is σ = 28509663744. Its totient is φ = 27712100640.

The previous prime is 28110841907. The next prime is 28110841999. The reversal of 28110841921 is 12914801182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28110841921 - 2²⁵ = 28077287489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28110841621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1213776 + ... + 1236718.

It is an arithmetic number, because the mean of its divisors is an integer number (3563707968).

Almost surely, 2^28110841921 is an apocalyptic number.

It is an amenable number.

28110841921 is a deficient number, since it is larger than the sum of its proper divisors (398821823).

28110841921 is a wasteful number, since it uses less digits than its factorization.

28110841921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40271.

The product of its (nonzero) digits is 9216, while the sum is 37.

The spelling of 28110841921 in words is "twenty-eight billion, one hundred ten million, eight hundred forty-one thousand, nine hundred twenty-one".