26828239 has 2 divisors, whose sum is σ = 26828240. Its totient is φ = 26828238.

The previous prime is 26828213. The next prime is 26828257. The reversal of 26828239 is 93282862.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26828239 - 2⁷ = 26828111 is a prime.

It is a super-2 number, since 2×26828239² = 1439508815682242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26829239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13414119 + 13414120.

It is an arithmetic number, because the mean of its divisors is an integer number (13414120).

Almost surely, 2^26828239 is an apocalyptic number.

26828239 is a deficient number, since it is larger than the sum of its proper divisors (1).

26828239 is an equidigital number, since it uses as much as digits as its factorization.

26828239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 40.

The square root of 26828239 is about 5179.5983435012. The cubic root of 26828239 is about 299.3624943964.

The spelling of 26828239 in words is "twenty-six million, eight hundred twenty-eight thousand, two hundred thirty-nine".