28675139 has 2 divisors, whose sum is σ = 28675140. Its totient is φ = 28675138.

The previous prime is 28675117. The next prime is 28675159. The reversal of 28675139 is 93157682.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28675139 - 2⁸ = 28674883 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28675096 and 28675105.

It is not a weakly prime, because it can be changed into another prime (28675159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14337569 + 14337570.

It is an arithmetic number, because the mean of its divisors is an integer number (14337570).

Almost surely, 2^28675139 is an apocalyptic number.

28675139 is a deficient number, since it is larger than the sum of its proper divisors (1).

28675139 is an equidigital number, since it uses as much as digits as its factorization.

28675139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 41.

The square root of 28675139 is about 5354.9172729371. The cubic root of 28675139 is about 306.0801582761.

The spelling of 28675139 in words is "twenty-eight million, six hundred seventy-five thousand, one hundred thirty-nine".