28990579 has 4 divisors (see below), whose sum is σ = 29031184. Its totient is φ = 28949976.

The previous prime is 28990571. The next prime is 28990597. The reversal of 28990579 is 97509982.

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 28990579 - 2³ = 28990571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28990571) 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, 19212 + ... + 20665.

It is an arithmetic number, because the mean of its divisors is an integer number (7257796).

Almost surely, 2^28990579 is an apocalyptic number.

28990579 is a deficient number, since it is larger than the sum of its proper divisors (40605).

28990579 is an equidigital number, since it uses as much as digits as its factorization.

28990579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40604.

The product of its (nonzero) digits is 408240, while the sum is 49.

The square root of 28990579 is about 5384.2900181918. The cubic root of 28990579 is about 307.1984096586.

The spelling of 28990579 in words is "twenty-eight million, nine hundred ninety thousand, five hundred seventy-nine".