28909079 has 2 divisors, whose sum is σ = 28909080. Its totient is φ = 28909078.

The previous prime is 28909063. The next prime is 28909103. The reversal of 28909079 is 97090982.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28909079 - 2⁴ = 28909063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28909039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14454539 + 14454540.

It is an arithmetic number, because the mean of its divisors is an integer number (14454540).

Almost surely, 2^28909079 is an apocalyptic number.

28909079 is a deficient number, since it is larger than the sum of its proper divisors (1).

28909079 is an equidigital number, since it uses as much as digits as its factorization.

28909079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 28909079 is about 5376.7163771209. The cubic root of 28909079 is about 306.9102681373.

The spelling of 28909079 in words is "twenty-eight million, nine hundred nine thousand, seventy-nine".