28138883 has 2 divisors, whose sum is σ = 28138884. Its totient is φ = 28138882.

The previous prime is 28138849. The next prime is 28138897. The reversal of 28138883 is 38883182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28138883 - 2⁶ = 28138819 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28138883.

It is not a weakly prime, because it can be changed into another prime (28138843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14069441 + 14069442.

It is an arithmetic number, because the mean of its divisors is an integer number (14069442).

Almost surely, 2^28138883 is an apocalyptic number.

28138883 is a deficient number, since it is larger than the sum of its proper divisors (1).

28138883 is an equidigital number, since it uses as much as digits as its factorization.

28138883 is an evil number, because the sum of its binary digits is even.

The product of its digits is 73728, while the sum is 41.

The square root of 28138883 is about 5304.6095992071. The cubic root of 28138883 is about 304.1601295983.

The spelling of 28138883 in words is "twenty-eight million, one hundred thirty-eight thousand, eight hundred eighty-three".