28564979 has 2 divisors, whose sum is σ = 28564980. Its totient is φ = 28564978.

The previous prime is 28564957. The next prime is 28565003. The reversal of 28564979 is 97946582.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28564979 - 2²⁰ = 27516403 is a prime.

It is not a weakly prime, because it can be changed into another prime (28564079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14282489 + 14282490.

It is an arithmetic number, because the mean of its divisors is an integer number (14282490).

Almost surely, 2^28564979 is an apocalyptic number.

28564979 is a deficient number, since it is larger than the sum of its proper divisors (1).

28564979 is an equidigital number, since it uses as much as digits as its factorization.

28564979 is an evil number, because the sum of its binary digits is even.

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

The square root of 28564979 is about 5344.6215020336. The cubic root of 28564979 is about 305.6877037995.

The spelling of 28564979 in words is "twenty-eight million, five hundred sixty-four thousand, nine hundred seventy-nine".