28574979 has 4 divisors (see below), whose sum is σ = 38099976. Its totient is φ = 19049984.

The previous prime is 28574957. The next prime is 28574983. The reversal of 28574979 is 97947582.

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 28574979 - 2⁷ = 28574851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28574999) 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, 4762494 + ... + 4762499.

It is an arithmetic number, because the mean of its divisors is an integer number (9524994).

Almost surely, 2^28574979 is an apocalyptic number.

28574979 is a deficient number, since it is larger than the sum of its proper divisors (9524997).

28574979 is an equidigital number, since it uses as much as digits as its factorization.

28574979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9524996.

The product of its digits is 1270080, while the sum is 51.

The square root of 28574979 is about 5345.5569401139. The cubic root of 28574979 is about 305.7233712555.

The spelling of 28574979 in words is "twenty-eight million, five hundred seventy-four thousand, nine hundred seventy-nine".