26138765 has 4 divisors (see below), whose sum is σ = 31366524. Its totient is φ = 20911008.

The previous prime is 26138719. The next prime is 26138767. The reversal of 26138765 is 56783162.

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 14394436 + 11744329 = 3794^2 + 3427^2 .

It is a cyclic number.

It is not a de Polignac number, because 26138765 - 2⁶ = 26138701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26138767) 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, 2613872 + ... + 2613881.

It is an arithmetic number, because the mean of its divisors is an integer number (7841631).

Almost surely, 2^26138765 is an apocalyptic number.

It is an amenable number.

26138765 is a deficient number, since it is larger than the sum of its proper divisors (5227759).

26138765 is an equidigital number, since it uses as much as digits as its factorization.

26138765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5227758.

The product of its digits is 60480, while the sum is 38.

The square root of 26138765 is about 5112.6084340579. The cubic root of 26138765 is about 296.7757114323.

The spelling of 26138765 in words is "twenty-six million, one hundred thirty-eight thousand, seven hundred sixty-five".