8163918 has 24 divisors (see below), whose sum is σ = 20215728. Its totient is φ = 2332512.

The previous prime is 8163917. The next prime is 8163923. The reversal of 8163918 is 8193618.

8163918 is a `hidden beast` number, since 8 + 1 + 639 + 18 = 666.

8163918 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×8163918² = 133299114221448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8163917) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32271 + ... + 32522.

It is an arithmetic number, because the mean of its divisors is an integer number (842322).

Almost surely, 2^8163918 is an apocalyptic number.

8163918 is an abundant number, since it is smaller than the sum of its proper divisors (12051810).

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

8163918 is a wasteful number, since it uses less digits than its factorization.

8163918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64808 (or 64805 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 8163918 is about 2857.2570762884. The cubic root of 8163918 is about 201.3567585519.

The spelling of 8163918 in words is "eight million, one hundred sixty-three thousand, nine hundred eighteen".