28289099 has 2 divisors, whose sum is σ = 28289100. Its totient is φ = 28289098.

The previous prime is 28289087. The next prime is 28289117. The reversal of 28289099 is 99098282.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28289099 - 2⁴ = 28289083 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28289039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14144549 + 14144550.

It is an arithmetic number, because the mean of its divisors is an integer number (14144550).

Almost surely, 2^28289099 is an apocalyptic number.

28289099 is a deficient number, since it is larger than the sum of its proper divisors (1).

28289099 is an equidigital number, since it uses as much as digits as its factorization.

28289099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 28289099 is about 5318.7497591069. The cubic root of 28289099 is about 304.7004099321.

The spelling of 28289099 in words is "twenty-eight million, two hundred eighty-nine thousand, ninety-nine".