26402839 has 2 divisors, whose sum is σ = 26402840. Its totient is φ = 26402838.

The previous prime is 26402807. The next prime is 26402843. The reversal of 26402839 is 93820462.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26402839 - 2⁵ = 26402807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26402869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13201419 + 13201420.

It is an arithmetic number, because the mean of its divisors is an integer number (13201420).

Almost surely, 2^26402839 is an apocalyptic number.

26402839 is a deficient number, since it is larger than the sum of its proper divisors (1).

26402839 is an equidigital number, since it uses as much as digits as its factorization.

26402839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 26402839 is about 5138.3692938519. The cubic root of 26402839 is about 297.7717837409.

The spelling of 26402839 in words is "twenty-six million, four hundred two thousand, eight hundred thirty-nine".