28745743189 has 4 divisors (see below), whose sum is σ = 29288115756. Its totient is φ = 28203370624.

The previous prime is 28745743157. The next prime is 28745743211. The reversal of 28745743189 is 98134754782.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8622051025 + 20123692164 = 92855^2 + 141858^2 .

It is a cyclic number.

It is not a de Polignac number, because 28745743189 - 2⁵ = 28745743157 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 (28745743289) 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, 271186204 + ... + 271186309.

It is an arithmetic number, because the mean of its divisors is an integer number (7322028939).

Almost surely, 2^28745743189 is an apocalyptic number.

It is an amenable number.

28745743189 is a deficient number, since it is larger than the sum of its proper divisors (542372567).

28745743189 is an equidigital number, since it uses as much as digits as its factorization.

28745743189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542372566.

The product of its digits is 13547520, while the sum is 58.

The spelling of 28745743189 in words is "twenty-eight billion, seven hundred forty-five million, seven hundred forty-three thousand, one hundred eighty-nine".