26139808 has 12 divisors (see below), whose sum is σ = 51462810. Its totient is φ = 13069888.

The previous prime is 26139803. The next prime is 26139811. The reversal of 26139808 is 80893162.

It can be written as a sum of positive squares in only one way, i.e., 20322064 + 5817744 = 4508^2 + 2412^2 .

It is not an unprimeable number, because it can be changed into a prime (26139803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408403 + ... + 408466.

Almost surely, 2^26139808 is an apocalyptic number.

It is an amenable number.

26139808 is a deficient number, since it is larger than the sum of its proper divisors (25323002).

26139808 is an equidigital number, since it uses as much as digits as its factorization.

26139808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816879 (or 816871 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 26139808 is about 5112.7104357669. The cubic root of 26139808 is about 296.7796587363.

It can be divided in two parts, 2613 and 9808, that added together give a palindrome (12421).

The spelling of 26139808 in words is "twenty-six million, one hundred thirty-nine thousand, eight hundred eight".