26815149 has 12 divisors (see below), whose sum is σ = 38778012. Its totient is φ = 17856000.

The previous prime is 26815141. The next prime is 26815153. The reversal of 26815149 is 94151862.

It can be written as a sum of positive squares in 2 ways, for example, as 13176900 + 13638249 = 3630^2 + 3693^2 .

It is not a de Polignac number, because 26815149 - 2³ = 26815141 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26815141) 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, 13479 + ... + 15339.

It is an arithmetic number, because the mean of its divisors is an integer number (3231501).

Almost surely, 2^26815149 is an apocalyptic number.

It is an amenable number.

26815149 is a deficient number, since it is larger than the sum of its proper divisors (11962863).

26815149 is a wasteful number, since it uses less digits than its factorization.

26815149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3468 (or 3465 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 26815149 is about 5178.3345778348. The cubic root of 26815149 is about 299.3137982874.

The spelling of 26815149 in words is "twenty-six million, eight hundred fifteen thousand, one hundred forty-nine".