8638266 has 48 divisors (see below), whose sum is σ = 21397824. Its totient is φ = 2276352.

The previous prime is 8638247. The next prime is 8638277. The reversal of 8638266 is 6628368.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6490 + ... + 7706.

It is an arithmetic number, because the mean of its divisors is an integer number (445788).

Almost surely, 2^8638266 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8638266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10698912).

8638266 is an abundant number, since it is smaller than the sum of its proper divisors (12759558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8638266 is a wasteful number, since it uses less digits than its factorization.

8638266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1255 (or 1242 counting only the distinct ones).

The product of its digits is 82944, while the sum is 39.

The square root of 8638266 is about 2939.0927171493. The cubic root of 8638266 is about 205.1833853759.

The spelling of 8638266 in words is "eight million, six hundred thirty-eight thousand, two hundred sixty-six".