8643212 has 12 divisors (see below), whose sum is σ = 15374016. Its totient is φ = 4250640.

The previous prime is 8643211. The next prime is 8643223. The reversal of 8643212 is 2123468.

It is a super-2 number, since 2×8643212² = 149410227353888, which contains 22 as substring.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (8643211) 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, 17468 + ... + 17955.

It is an arithmetic number, because the mean of its divisors is an integer number (1281168).

Almost surely, 2^8643212 is an apocalyptic number.

It is an amenable number.

8643212 is a deficient number, since it is larger than the sum of its proper divisors (6730804).

8643212 is a wasteful number, since it uses less digits than its factorization.

8643212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35488 (or 35486 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

The square root of 8643212 is about 2939.9340128649. The cubic root of 8643212 is about 205.2225384265. Note that the first 3 decimals are identical.

The spelling of 8643212 in words is "eight million, six hundred forty-three thousand, two hundred twelve".