8638222 has 4 divisors (see below), whose sum is σ = 12957336. Its totient is φ = 4319110.

The previous prime is 8638219. The next prime is 8638229. The reversal of 8638222 is 2228368.

8638222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×8638222³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8638229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2159554 + ... + 2159557.

It is an arithmetic number, because the mean of its divisors is an integer number (3239334).

Almost surely, 2^8638222 is an apocalyptic number.

8638222 is a deficient number, since it is larger than the sum of its proper divisors (4319114).

8638222 is a wasteful number, since it uses less digits than its factorization.

8638222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4319113.

The product of its digits is 9216, while the sum is 31.

The square root of 8638222 is about 2939.0852318366. The cubic root of 8638222 is about 205.1830370002.

The spelling of 8638222 in words is "eight million, six hundred thirty-eight thousand, two hundred twenty-two".