26808531 has 16 divisors (see below), whose sum is σ = 36491520. Its totient is φ = 17503200.

The previous prime is 26808517. The next prime is 26808539. The reversal of 26808531 is 13580862.

It is a happy number.

It is not a de Polignac number, because 26808531 - 2¹³ = 26800339 is a prime.

It is a super-2 number, since 2×26808531² = 1437394668755922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 26808492 and 26808501.

It is not an unprimeable number, because it can be changed into a prime (26808539) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 30780 + ... + 31638.

It is an arithmetic number, because the mean of its divisors is an integer number (2280720).

Almost surely, 2^26808531 is an apocalyptic number.

26808531 is a deficient number, since it is larger than the sum of its proper divisors (9682989).

26808531 is a wasteful number, since it uses less digits than its factorization.

26808531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 26808531 is about 5177.6955298665. The cubic root of 26808531 is about 299.2891726340.

It can be divided in two parts, 2680 and 8531, that added together give a palindrome (11211).

The spelling of 26808531 in words is "twenty-six million, eight hundred eight thousand, five hundred thirty-one".