26438497 has 4 divisors (see below), whose sum is σ = 26672580. Its totient is φ = 26204416.

The previous prime is 26438473. The next prime is 26438509. The reversal of 26438497 is 79483462.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7420176 + 19018321 = 2724^2 + 4361^2 .

It is a cyclic number.

It is not a de Polignac number, because 26438497 - 2⁷ = 26438369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26438407) 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 3 ways as a sum of consecutive naturals, for example, 116872 + ... + 117097.

It is an arithmetic number, because the mean of its divisors is an integer number (6668145).

Almost surely, 2^26438497 is an apocalyptic number.

It is an amenable number.

26438497 is a deficient number, since it is larger than the sum of its proper divisors (234083).

26438497 is a wasteful number, since it uses less digits than its factorization.

26438497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234082.

The product of its digits is 290304, while the sum is 43.

The square root of 26438497 is about 5141.8379009844. The cubic root of 26438497 is about 297.9057740020.

The spelling of 26438497 in words is "twenty-six million, four hundred thirty-eight thousand, four hundred ninety-seven".