26864439 has 16 divisors (see below), whose sum is σ = 41018112. Its totient is φ = 15320448.

The previous prime is 26864429. The next prime is 26864459. The reversal of 26864439 is 93446862.

It is a happy number.

It is not a de Polignac number, because 26864439 - 2¹⁹ = 26340151 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26864439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26864429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13407 + ... + 15279.

It is an arithmetic number, because the mean of its divisors is an integer number (2563632).

Almost surely, 2^26864439 is an apocalyptic number.

26864439 is a deficient number, since it is larger than the sum of its proper divisors (14153673).

26864439 is a wasteful number, since it uses less digits than its factorization.

26864439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2566.

The product of its digits is 248832, while the sum is 42.

The square root of 26864439 is about 5183.0916449548. The cubic root of 26864439 is about 299.4970795969.

The spelling of 26864439 in words is "twenty-six million, eight hundred sixty-four thousand, four hundred thirty-nine".