28869199 has 2 divisors, whose sum is σ = 28869200. Its totient is φ = 28869198.

The previous prime is 28869187. The next prime is 28869221. The reversal of 28869199 is 99196882.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28869199 - 2⁹ = 28868687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28869109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14434599 + 14434600.

It is an arithmetic number, because the mean of its divisors is an integer number (14434600).

Almost surely, 2^28869199 is an apocalyptic number.

28869199 is a deficient number, since it is larger than the sum of its proper divisors (1).

28869199 is an equidigital number, since it uses as much as digits as its factorization.

28869199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 52.

The square root of 28869199 is about 5373.0065140478. The cubic root of 28869199 is about 306.7690758845.

The spelling of 28869199 in words is "twenty-eight million, eight hundred sixty-nine thousand, one hundred ninety-nine".