28271017999 has 8 divisors (see below), whose sum is σ = 32969117600. Its totient is φ = 24232300848.

The previous prime is 28271017967. The next prime is 28271018021. The reversal of 28271017999 is 99971017282.

It is not a de Polignac number, because 28271017999 - 2⁵ = 28271017967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28271017399) 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, 41211054 + ... + 41211739.

It is an arithmetic number, because the mean of its divisors is an integer number (4121139700).

Almost surely, 2^28271017999 is an apocalyptic number.

28271017999 is a deficient number, since it is larger than the sum of its proper divisors (4698099601).

28271017999 is an frugal number, since it uses more digits than its factorization.

28271017999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82422814 (or 82422800 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 55.

The spelling of 28271017999 in words is "twenty-eight billion, two hundred seventy-one million, seventeen thousand, nine hundred ninety-nine".