28925227389 has 4 divisors (see below), whose sum is σ = 38566969856. Its totient is φ = 19283484924.

The previous prime is 28925227367. The next prime is 28925227403. The reversal of 28925227389 is 98372252982.

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 28925227389 - 2⁹ = 28925226877 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 (28925227349) 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, 4820871229 + ... + 4820871234.

It is an arithmetic number, because the mean of its divisors is an integer number (9641742464).

Almost surely, 2^28925227389 is an apocalyptic number.

It is an amenable number.

28925227389 is a deficient number, since it is larger than the sum of its proper divisors (9641742467).

28925227389 is an equidigital number, since it uses as much as digits as its factorization.

28925227389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9641742466.

The product of its digits is 8709120, while the sum is 57.

The spelling of 28925227389 in words is "twenty-eight billion, nine hundred twenty-five million, two hundred twenty-seven thousand, three hundred eighty-nine".