28392830121 has 4 divisors (see below), whose sum is σ = 37857106832. Its totient is φ = 18928553412.

The previous prime is 28392830113. The next prime is 28392830183. The reversal of 28392830121 is 12103829382.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 28392830121 - 2³ = 28392830113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28392830121.

It is not an unprimeable number, because it can be changed into a prime (28392830111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4732138351 + ... + 4732138356.

It is an arithmetic number, because the mean of its divisors is an integer number (9464276708).

Almost surely, 2^28392830121 is an apocalyptic number.

It is an amenable number.

28392830121 is a deficient number, since it is larger than the sum of its proper divisors (9464276711).

28392830121 is an equidigital number, since it uses as much as digits as its factorization.

28392830121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9464276710.

The product of its (nonzero) digits is 41472, while the sum is 39.

The spelling of 28392830121 in words is "twenty-eight billion, three hundred ninety-two million, eight hundred thirty thousand, one hundred twenty-one".