28840099 has 2 divisors, whose sum is σ = 28840100. Its totient is φ = 28840098.

The previous prime is 28840087. The next prime is 28840117. The reversal of 28840099 is 99004882.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28840099 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28840039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14420049 + 14420050.

It is an arithmetic number, because the mean of its divisors is an integer number (14420050).

Almost surely, 2^28840099 is an apocalyptic number.

28840099 is a deficient number, since it is larger than the sum of its proper divisors (1).

28840099 is an equidigital number, since it uses as much as digits as its factorization.

28840099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 28840099 is about 5370.2978502128. The cubic root of 28840099 is about 306.6659673635.

The spelling of 28840099 in words is "twenty-eight million, eight hundred forty thousand, ninety-nine".