26686231 has 16 divisors (see below), whose sum is σ = 31893120. Its totient is φ = 22007520.

The previous prime is 26686229. The next prime is 26686237. The reversal of 26686231 is 13268662.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 26686231 - 2¹ = 26686229 is a prime.

It is a super-2 number, since 2×26686231² = 1424309849970722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26686237) 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, 6856 + ... + 10018.

It is an arithmetic number, because the mean of its divisors is an integer number (1993320).

Almost surely, 2^26686231 is an apocalyptic number.

26686231 is a deficient number, since it is larger than the sum of its proper divisors (5206889).

26686231 is a wasteful number, since it uses less digits than its factorization.

26686231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3246.

The product of its digits is 20736, while the sum is 34.

The square root of 26686231 is about 5165.8717560543. The cubic root of 26686231 is about 298.8333616568.

Subtracting from 26686231 its reverse (13268662), we obtain a square (13417569 = 3663²).

The spelling of 26686231 in words is "twenty-six million, six hundred eighty-six thousand, two hundred thirty-one".