1983866 has 32 divisors (see below), whose sum is σ = 3447360. Its totient is φ = 850176.

The previous prime is 1983859. The next prime is 1983871. The reversal of 1983866 is 6683891.

It is a happy number.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23861 + ... + 23943.

It is an arithmetic number, because the mean of its divisors is an integer number (107730).

2^1983866 is an apocalyptic number.

1983866 is a deficient number, since it is larger than the sum of its proper divisors (1463494).

1983866 is a wasteful number, since it uses less digits than its factorization.

1983866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158.

The product of its digits is 62208, while the sum is 41.

The square root of 1983866 is about 1408.4977813259. The cubic root of 1983866 is about 125.6523971005.

The spelling of 1983866 in words is "one million, nine hundred eighty-three thousand, eight hundred sixty-six".