8268391 has 4 divisors (see below), whose sum is σ = 8274784. Its totient is φ = 8262000.

The previous prime is 8268389. The next prime is 8268397. The reversal of 8268391 is 1938628.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 8268391 - 2¹ = 8268389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8268391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8268397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 495 + ... + 4096.

It is an arithmetic number, because the mean of its divisors is an integer number (2068696).

Almost surely, 2^8268391 is an apocalyptic number.

8268391 is a deficient number, since it is larger than the sum of its proper divisors (6393).

8268391 is a wasteful number, since it uses less digits than its factorization.

8268391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6392.

The product of its digits is 20736, while the sum is 37.

The square root of 8268391 is about 2875.4810032410. The cubic root of 8268391 is about 202.2120359537.

The spelling of 8268391 in words is "eight million, two hundred sixty-eight thousand, three hundred ninety-one".