8266389 has 4 divisors (see below), whose sum is σ = 11021856. Its totient is φ = 5510924.

The previous prime is 8266373. The next prime is 8266411. The reversal of 8266389 is 9836628.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8266389 - 2⁴ = 8266373 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8266389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8266309) 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, 1377729 + ... + 1377734.

It is an arithmetic number, because the mean of its divisors is an integer number (2755464).

Almost surely, 2^8266389 is an apocalyptic number.

It is an amenable number.

8266389 is a deficient number, since it is larger than the sum of its proper divisors (2755467).

8266389 is a wasteful number, since it uses less digits than its factorization.

8266389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2755466.

The product of its digits is 124416, while the sum is 42.

The square root of 8266389 is about 2875.1328664950. The cubic root of 8266389 is about 202.1957143109.

The spelling of 8266389 in words is "eight million, two hundred sixty-six thousand, three hundred eighty-nine".