28836139 has 2 divisors, whose sum is σ = 28836140. Its totient is φ = 28836138.

The previous prime is 28836083. The next prime is 28836149. The reversal of 28836139 is 93163882.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28836139 - 2⁹ = 28835627 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28836149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14418069 + 14418070.

It is an arithmetic number, because the mean of its divisors is an integer number (14418070).

Almost surely, 2^28836139 is an apocalyptic number.

28836139 is a deficient number, since it is larger than the sum of its proper divisors (1).

28836139 is an equidigital number, since it uses as much as digits as its factorization.

28836139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 40.

The square root of 28836139 is about 5369.9291429217. The cubic root of 28836139 is about 306.6519307401.

The spelling of 28836139 in words is "twenty-eight million, eight hundred thirty-six thousand, one hundred thirty-nine".