26889669 has 12 divisors (see below), whose sum is σ = 38930892. Its totient is φ = 17884800.

The previous prime is 26889649. The next prime is 26889677. The reversal of 26889669 is 96698862.

It can be written as a sum of positive squares in 2 ways, for example, as 18404100 + 8485569 = 4290^2 + 2913^2 .

It is not a de Polignac number, because 26889669 - 2⁵ = 26889637 is a prime.

It is a super-2 number, since 2×26889669² = 1446108597859122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26889619) 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 in 11 ways as a sum of consecutive naturals, for example, 909 + ... + 7389.

It is an arithmetic number, because the mean of its divisors is an integer number (3244241).

Almost surely, 2^26889669 is an apocalyptic number.

It is an amenable number.

26889669 is a deficient number, since it is larger than the sum of its proper divisors (12041223).

26889669 is a wasteful number, since it uses less digits than its factorization.

26889669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6948 (or 6945 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 26889669 is about 5185.5249493181. The cubic root of 26889669 is about 299.5908087956.

The spelling of 26889669 in words is "twenty-six million, eight hundred eighty-nine thousand, six hundred sixty-nine".