28845527389 has 4 divisors (see below), whose sum is σ = 32966317024. Its totient is φ = 24724737756.

The previous prime is 28845527383. The next prime is 28845527429. The reversal of 28845527389 is 98372554882.

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 28845527389 - 2²⁷ = 28711309661 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 (28845527383) 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, 2060394807 + ... + 2060394820.

It is an arithmetic number, because the mean of its divisors is an integer number (8241579256).

Almost surely, 2^28845527389 is an apocalyptic number.

It is an amenable number.

28845527389 is a deficient number, since it is larger than the sum of its proper divisors (4120789635).

28845527389 is an equidigital number, since it uses as much as digits as its factorization.

28845527389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4120789634.

The product of its digits is 38707200, while the sum is 61.

It can be divided in two parts, 288455 and 27389, that added together give a square (315844 = 562²).

The spelling of 28845527389 in words is "twenty-eight billion, eight hundred forty-five million, five hundred twenty-seven thousand, three hundred eighty-nine".