28298879 has 4 divisors (see below), whose sum is σ = 32341584. Its totient is φ = 24256176.

The previous prime is 28298869. The next prime is 28298899. The reversal of 28298879 is 97889282.

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

It is not a de Polignac number, because 28298879 - 2⁸ = 28298623 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 28298879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28298869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2021342 + ... + 2021355.

It is an arithmetic number, because the mean of its divisors is an integer number (8085396).

Almost surely, 2^28298879 is an apocalyptic number.

28298879 is a deficient number, since it is larger than the sum of its proper divisors (4042705).

28298879 is an equidigital number, since it uses as much as digits as its factorization.

28298879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4042704.

The product of its digits is 1161216, while the sum is 53.

The square root of 28298879 is about 5319.6690686546. The cubic root of 28298879 is about 304.7355191764.

The spelling of 28298879 in words is "twenty-eight million, two hundred ninety-eight thousand, eight hundred seventy-nine".