28025979 has 16 divisors (see below), whose sum is σ = 39886848. Its totient is φ = 17442432.

The previous prime is 28025951. The next prime is 28025989. The reversal of 28025979 is 97952082.

It is not a de Polignac number, because 28025979 - 2⁵ = 28025947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28025979.

It is not an unprimeable number, because it can be changed into a prime (28025929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4314 + ... + 8640.

It is an arithmetic number, because the mean of its divisors is an integer number (2492928).

Almost surely, 2^28025979 is an apocalyptic number.

28025979 is a deficient number, since it is larger than the sum of its proper divisors (11860869).

28025979 is a wasteful number, since it uses less digits than its factorization.

28025979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4474.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 28025979 is about 5293.9568377538. The cubic root of 28025979 is about 303.7527819014.

The spelling of 28025979 in words is "twenty-eight million, twenty-five thousand, nine hundred seventy-nine".