2163986 has 32 divisors (see below), whose sum is σ = 3870720. Its totient is φ = 896400.

The previous prime is 2163983. The next prime is 2164003. The reversal of 2163986 is 6893612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2163983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12875 + ... + 13041.

It is an arithmetic number, because the mean of its divisors is an integer number (120960).

2^2163986 is an apocalyptic number.

2163986 is a deficient number, since it is larger than the sum of its proper divisors (1706734).

2163986 is a wasteful number, since it uses less digits than its factorization.

2163986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230.

The product of its digits is 15552, while the sum is 35.

The square root of 2163986 is about 1471.0492853742. The cubic root of 2163986 is about 129.3455471395.

The spelling of 2163986 in words is "two million, one hundred sixty-three thousand, nine hundred eighty-six".