26380505 has 4 divisors (see below), whose sum is σ = 31656612. Its totient is φ = 21104400.

The previous prime is 26380499. The next prime is 26380511. The reversal of 26380505 is 50508362.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (26380499) and next prime (26380511).

It can be written as a sum of positive squares in 2 ways, for example, as 17547721 + 8832784 = 4189^2 + 2972^2 .

It is not a de Polignac number, because 26380505 - 2⁶ = 26380441 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2638046 + ... + 2638055.

It is an arithmetic number, because the mean of its divisors is an integer number (7914153).

Almost surely, 2^26380505 is an apocalyptic number.

It is an amenable number.

26380505 is a deficient number, since it is larger than the sum of its proper divisors (5276107).

26380505 is an equidigital number, since it uses as much as digits as its factorization.

26380505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5276106.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 26380505 is about 5136.1955764943. The cubic root of 26380505 is about 297.6877989456.

Adding to 26380505 its reverse (50508362), we get a palindrome (76888867).

The spelling of 26380505 in words is "twenty-six million, three hundred eighty thousand, five hundred five".