28279579 has 2 divisors, whose sum is σ = 28279580. Its totient is φ = 28279578.

The previous prime is 28279549. The next prime is 28279583. The reversal of 28279579 is 97597282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28279579 - 2⁷ = 28279451 is a prime.

It is not a weakly prime, because it can be changed into another prime (28279519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14139789 + 14139790.

It is an arithmetic number, because the mean of its divisors is an integer number (14139790).

Almost surely, 2^28279579 is an apocalyptic number.

28279579 is a deficient number, since it is larger than the sum of its proper divisors (1).

28279579 is an equidigital number, since it uses as much as digits as its factorization.

28279579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 49.

The square root of 28279579 is about 5317.8547366396. The cubic root of 28279579 is about 304.6662262894. Note that the first 3 decimals are identical.

The spelling of 28279579 in words is "twenty-eight million, two hundred seventy-nine thousand, five hundred seventy-nine".