28822579 has 4 divisors (see below), whose sum is σ = 28840480. Its totient is φ = 28804680.

The previous prime is 28822567. The next prime is 28822583. The reversal of 28822579 is 97522882.

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 28822579 - 2¹¹ = 28820531 is a prime.

It is a super-2 number, since 2×28822579² = 1661482120422482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28822559) 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, 6267 + ... + 9844.

It is an arithmetic number, because the mean of its divisors is an integer number (7210120).

Almost surely, 2^28822579 is an apocalyptic number.

28822579 is a deficient number, since it is larger than the sum of its proper divisors (17901).

28822579 is a wasteful number, since it uses less digits than its factorization.

28822579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17900.

The product of its digits is 161280, while the sum is 43.

The square root of 28822579 is about 5368.6664079639. Note that the first 3 decimals coincide. The cubic root of 28822579 is about 306.6038562026.

The spelling of 28822579 in words is "twenty-eight million, eight hundred twenty-two thousand, five hundred seventy-nine".