28750979 has 2 divisors, whose sum is σ = 28750980. Its totient is φ = 28750978.

The previous prime is 28750913. The next prime is 28750987. The reversal of 28750979 is 97905782.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28750979 - 2²⁰ = 27702403 is a prime.

It is not a weakly prime, because it can be changed into another prime (28750679) 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 as a sum of consecutive naturals, namely, 14375489 + 14375490.

It is an arithmetic number, because the mean of its divisors is an integer number (14375490).

Almost surely, 2^28750979 is an apocalyptic number.

28750979 is a deficient number, since it is larger than the sum of its proper divisors (1).

28750979 is an equidigital number, since it uses as much as digits as its factorization.

28750979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 317520, while the sum is 47.

The square root of 28750979 is about 5361.9939388254. The cubic root of 28750979 is about 306.3497609743.

The spelling of 28750979 in words is "twenty-eight million, seven hundred fifty thousand, nine hundred seventy-nine".