26806765 has 4 divisors (see below), whose sum is σ = 32168124. Its totient is φ = 21445408.

The previous prime is 26806763. The next prime is 26806771. The reversal of 26806765 is 56760862.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56760862 = 2 ⋅28380431.

It can be written as a sum of positive squares in 2 ways, for example, as 7279204 + 19527561 = 2698^2 + 4419^2 .

It is a cyclic number.

It is not a de Polignac number, because 26806765 - 2¹ = 26806763 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 (26806763) 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, 2680672 + ... + 2680681.

It is an arithmetic number, because the mean of its divisors is an integer number (8042031).

Almost surely, 2^26806765 is an apocalyptic number.

It is an amenable number.

26806765 is a deficient number, since it is larger than the sum of its proper divisors (5361359).

26806765 is an equidigital number, since it uses as much as digits as its factorization.

26806765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5361358.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 26806765 is about 5177.5249878682. The cubic root of 26806765 is about 299.2826006428.

The spelling of 26806765 in words is "twenty-six million, eight hundred six thousand, seven hundred sixty-five".