26690039 has 4 divisors (see below), whose sum is σ = 27551040. Its totient is φ = 25829040.

The previous prime is 26690033. The next prime is 26690047. The reversal of 26690039 is 93009662.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 26690039 - 2²⁰ = 25641463 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26689990 and 26690008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26690033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 430454 + ... + 430515.

It is an arithmetic number, because the mean of its divisors is an integer number (6887760).

Almost surely, 2^26690039 is an apocalyptic number.

26690039 is a deficient number, since it is larger than the sum of its proper divisors (861001).

26690039 is an equidigital number, since it uses as much as digits as its factorization.

26690039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861000.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 26690039 is about 5166.2403157422. The cubic root of 26690039 is about 298.8475750204.

The spelling of 26690039 in words is "twenty-six million, six hundred ninety thousand, thirty-nine".