28282139 has 2 divisors, whose sum is σ = 28282140. Its totient is φ = 28282138.

The previous prime is 28282123. The next prime is 28282147. The reversal of 28282139 is 93128282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28282139 - 2⁴ = 28282123 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 28282099 and 28282108.

It is not a weakly prime, because it can be changed into another prime (28282159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14141069 + 14141070.

It is an arithmetic number, because the mean of its divisors is an integer number (14141070).

Almost surely, 2^28282139 is an apocalyptic number.

28282139 is a deficient number, since it is larger than the sum of its proper divisors (1).

28282139 is an equidigital number, since it uses as much as digits as its factorization.

28282139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 35.

The square root of 28282139 is about 5318.0954297568. The cubic root of 28282139 is about 304.6754192834.

The spelling of 28282139 in words is "twenty-eight million, two hundred eighty-two thousand, one hundred thirty-nine".