28743117389 has 4 divisors (see below), whose sum is σ = 32849277024. Its totient is φ = 24636957756.

The previous prime is 28743117371. The next prime is 28743117433. The reversal of 28743117389 is 98371134782.

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 a cyclic number.

It is not a de Polignac number, because 28743117389 - 2¹⁶ = 28743051853 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 28743117389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28743111389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2053079807 + ... + 2053079820.

It is an arithmetic number, because the mean of its divisors is an integer number (8212319256).

Almost surely, 2^28743117389 is an apocalyptic number.

It is an amenable number.

28743117389 is a deficient number, since it is larger than the sum of its proper divisors (4106159635).

28743117389 is an equidigital number, since it uses as much as digits as its factorization.

28743117389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4106159634.

The product of its digits is 2032128, while the sum is 53.

The spelling of 28743117389 in words is "twenty-eight billion, seven hundred forty-three million, one hundred seventeen thousand, three hundred eighty-nine".