28054289 has 4 divisors (see below), whose sum is σ = 28097520. Its totient is φ = 28011060.

The previous prime is 28054277. The next prime is 28054303. The reversal of 28054289 is 98245082.

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 a de Polignac number, because none of the positive numbers 2^k-28054289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28054259) 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, 20627 + ... + 21944.

It is an arithmetic number, because the mean of its divisors is an integer number (7024380).

Almost surely, 2^28054289 is an apocalyptic number.

It is an amenable number.

28054289 is a deficient number, since it is larger than the sum of its proper divisors (43231).

28054289 is an equidigital number, since it uses as much as digits as its factorization.

28054289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43230.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 28054289 is about 5296.6299663088. The cubic root of 28054289 is about 303.8550245078.

The spelling of 28054289 in words is "twenty-eight million, fifty-four thousand, two hundred eighty-nine".