1986868 has 24 divisors (see below), whose sum is σ = 3943520. Its totient is φ = 868320.

The previous prime is 1986839. The next prime is 1986869. The reversal of 1986868 is 8686891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1986869) 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, 18 + ... + 1993.

2^1986868 is an apocalyptic number.

It is an amenable number.

1986868 is a deficient number, since it is larger than the sum of its proper divisors (1956652).

1986868 is a wasteful number, since it uses less digits than its factorization.

1986868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2047 (or 2045 counting only the distinct ones).

The product of its digits is 165888, while the sum is 46.

The square root of 1986868 is about 1409.5630528643. The cubic root of 1986868 is about 125.7157445226.

The spelling of 1986868 in words is "one million, nine hundred eighty-six thousand, eight hundred sixty-eight".