26440249 has 4 divisors (see below), whose sum is σ = 28843920. Its totient is φ = 24036580.

The previous prime is 26440247. The next prime is 26440261. The reversal of 26440249 is 94204462.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 26440249 - 2¹ = 26440247 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26440249.

It is not an unprimeable number, because it can be changed into a prime (26440243) 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, 1201819 + ... + 1201840.

It is an arithmetic number, because the mean of its divisors is an integer number (7210980).

Almost surely, 2^26440249 is an apocalyptic number.

It is an amenable number.

26440249 is a deficient number, since it is larger than the sum of its proper divisors (2403671).

26440249 is a wasteful number, since it uses less digits than its factorization.

26440249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2403670.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 26440249 is about 5142.0082652598. The cubic root of 26440249 is about 297.9123542977.

The spelling of 26440249 in words is "twenty-six million, four hundred forty thousand, two hundred forty-nine".