26385865 has 12 divisors (see below), whose sum is σ = 34803972. Its totient is φ = 19189280.

The previous prime is 26385857. The next prime is 26385869. The reversal of 26385865 is 56858362.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14907321 + 11478544 = 3861^2 + 3388^2 .

It is not a de Polignac number, because 26385865 - 2³ = 26385857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26385869) 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, 21202 + ... + 22411.

It is an arithmetic number, because the mean of its divisors is an integer number (2900331).

Almost surely, 2^26385865 is an apocalyptic number.

It is an amenable number.

26385865 is a deficient number, since it is larger than the sum of its proper divisors (8418107).

26385865 is a wasteful number, since it uses less digits than its factorization.

26385865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43640 (or 43629 counting only the distinct ones).

The product of its digits is 345600, while the sum is 43.

The square root of 26385865 is about 5136.7173369770. The cubic root of 26385865 is about 297.7079590165.

The spelling of 26385865 in words is "twenty-six million, three hundred eighty-five thousand, eight hundred sixty-five".