28032899 has 2 divisors, whose sum is σ = 28032900. Its totient is φ = 28032898.

The previous prime is 28032887. The next prime is 28032967. The reversal of 28032899 is 99823082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28032899 - 2²⁰ = 26984323 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28032839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14016449 + 14016450.

It is an arithmetic number, because the mean of its divisors is an integer number (14016450).

Almost surely, 2^28032899 is an apocalyptic number.

28032899 is a deficient number, since it is larger than the sum of its proper divisors (1).

28032899 is an equidigital number, since it uses as much as digits as its factorization.

28032899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 28032899 is about 5294.6103728225. The cubic root of 28032899 is about 303.7777800917. Note that the first 4 decimals are identical.

The spelling of 28032899 in words is "twenty-eight million, thirty-two thousand, eight hundred ninety-nine".