26396869 has 4 divisors (see below), whose sum is σ = 27949644. Its totient is φ = 24844096.

The previous prime is 26396863. The next prime is 26396879. The reversal of 26396869 is 96869362.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96869362 = 2 ⋅48434681.

It can be written as a sum of positive squares in 2 ways, for example, as 20930625 + 5466244 = 4575^2 + 2338^2 .

It is a cyclic number.

It is not a de Polignac number, because 26396869 - 2¹⁵ = 26364101 is a prime.

It is a super-2 number, since 2×26396869² = 1393589386006322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26396863) 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 in 3 ways as a sum of consecutive naturals, for example, 776362 + ... + 776395.

It is an arithmetic number, because the mean of its divisors is an integer number (6987411).

Almost surely, 2^26396869 is an apocalyptic number.

It is an amenable number.

26396869 is a deficient number, since it is larger than the sum of its proper divisors (1552775).

26396869 is a wasteful number, since it uses less digits than its factorization.

26396869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1552774.

The product of its digits is 839808, while the sum is 49.

The square root of 26396869 is about 5137.7883374074. The cubic root of 26396869 is about 297.7493387865.

The spelling of 26396869 in words is "twenty-six million, three hundred ninety-six thousand, eight hundred sixty-nine".