26538813 has 16 divisors (see below), whose sum is σ = 44933760. Its totient is φ = 15164928.

The previous prime is 26538781. The next prime is 26538829. The reversal of 26538813 is 31883562.

26538813 is a `hidden beast` number, since 265 + 388 + 13 = 666.

It is not a de Polignac number, because 26538813 - 2⁵ = 26538781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26538833) 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, 70020 + ... + 70397.

It is an arithmetic number, because the mean of its divisors is an integer number (2808360).

Almost surely, 2^26538813 is an apocalyptic number.

It is an amenable number.

26538813 is a deficient number, since it is larger than the sum of its proper divisors (18394947).

26538813 is a wasteful number, since it uses less digits than its factorization.

26538813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140433 (or 140427 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 26538813 is about 5151.5835429507. The cubic root of 26538813 is about 298.2820812955.

The spelling of 26538813 in words is "twenty-six million, five hundred thirty-eight thousand, eight hundred thirteen".