28496579 has 4 divisors (see below), whose sum is σ = 28535880. Its totient is φ = 28457280.

The previous prime is 28496557. The next prime is 28496581. The reversal of 28496579 is 97569482.

It is a happy number.

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 28496579 - 2⁸ = 28496323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28496509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18542 + ... + 20019.

It is an arithmetic number, because the mean of its divisors is an integer number (7133970).

Almost surely, 2^28496579 is an apocalyptic number.

28496579 is a deficient number, since it is larger than the sum of its proper divisors (39301).

28496579 is an equidigital number, since it uses as much as digits as its factorization.

28496579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39300.

The product of its digits is 1088640, while the sum is 50.

The square root of 28496579 is about 5338.2187103939. The cubic root of 28496579 is about 305.4435149234.

The spelling of 28496579 in words is "twenty-eight million, four hundred ninety-six thousand, five hundred seventy-nine".