28813579 has 2 divisors, whose sum is σ = 28813580. Its totient is φ = 28813578.

The previous prime is 28813523. The next prime is 28813597. The reversal of 28813579 is 97531882.

Together with next prime (28813597) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28813579 is a prime.

It is not a weakly prime, because it can be changed into another prime (28813979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14406789 + 14406790.

It is an arithmetic number, because the mean of its divisors is an integer number (14406790).

Almost surely, 2^28813579 is an apocalyptic number.

28813579 is a deficient number, since it is larger than the sum of its proper divisors (1).

28813579 is an equidigital number, since it uses as much as digits as its factorization.

28813579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 43.

The square root of 28813579 is about 5367.8281455352. The cubic root of 28813579 is about 306.5719399982.

It can be divided in two parts, 28813 and 579, that added together give a palindrome (29392).

The spelling of 28813579 in words is "twenty-eight million, eight hundred thirteen thousand, five hundred seventy-nine".