26380639 has 2 divisors, whose sum is σ = 26380640. Its totient is φ = 26380638.

The previous prime is 26380621. The next prime is 26380663. The reversal of 26380639 is 93608362.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26380639 - 2⁷ = 26380511 is a prime.

It is a super-2 number, since 2×26380639² = 1391876228096642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 26380598 and 26380607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26380619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13190319 + 13190320.

It is an arithmetic number, because the mean of its divisors is an integer number (13190320).

Almost surely, 2^26380639 is an apocalyptic number.

26380639 is a deficient number, since it is larger than the sum of its proper divisors (1).

26380639 is an equidigital number, since it uses as much as digits as its factorization.

26380639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 26380639 is about 5136.2086211524. The cubic root of 26380639 is about 297.6883029807.

The spelling of 26380639 in words is "twenty-six million, three hundred eighty thousand, six hundred thirty-nine".