8643942 has 16 divisors (see below), whose sum is σ = 19208880. Its totient is φ = 2881296.

The previous prime is 8643941. The next prime is 8643953. The reversal of 8643942 is 2493468.

It is a happy number.

8643942 is a `hidden beast` number, since 8 + 643 + 9 + 4 + 2 = 666.

8643942 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 8643897 and 8643906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8643941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79983 + ... + 80090.

It is an arithmetic number, because the mean of its divisors is an integer number (1200555).

Almost surely, 2^8643942 is an apocalyptic number.

8643942 is an abundant number, since it is smaller than the sum of its proper divisors (10564938).

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

8643942 is a wasteful number, since it uses less digits than its factorization.

8643942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160084 (or 160078 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 8643942 is about 2940.0581626900. The cubic root of 8643942 is about 205.2283159174.

The spelling of 8643942 in words is "eight million, six hundred forty-three thousand, nine hundred forty-two".