28298579 has 4 divisors (see below), whose sum is σ = 29528976. Its totient is φ = 27068184.

The previous prime is 28298573. The next prime is 28298587. The reversal of 28298579 is 97589282.

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

It is a cyclic number.

It is not a de Polignac number, because 28298579 - 2⁴ = 28298563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28298573) 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, 615164 + ... + 615209.

It is an arithmetic number, because the mean of its divisors is an integer number (7382244).

Almost surely, 2^28298579 is an apocalyptic number.

28298579 is a deficient number, since it is larger than the sum of its proper divisors (1230397).

28298579 is a wasteful number, since it uses less digits than its factorization.

28298579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230396.

The product of its digits is 725760, while the sum is 50.

The square root of 28298579 is about 5319.6408713371. The cubic root of 28298579 is about 304.7344423260.

The spelling of 28298579 in words is "twenty-eight million, two hundred ninety-eight thousand, five hundred seventy-nine".