1986844 has 6 divisors (see below), whose sum is σ = 3476984. Its totient is φ = 993420.

The previous prime is 1986839. The next prime is 1986869. The reversal of 1986844 is 4486891.

It is a junction number, because it is equal to n+sod(n) for n = 1986797 and 1986806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248352 + ... + 248359.

2^1986844 is an apocalyptic number.

It is an amenable number.

1986844 is a deficient number, since it is larger than the sum of its proper divisors (1490140).

1986844 is a wasteful number, since it uses less digits than its factorization.

1986844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496715 (or 496713 counting only the distinct ones).

The product of its digits is 55296, while the sum is 40.

The square root of 1986844 is about 1409.5545395621. The cubic root of 1986844 is about 125.7152383340.

The spelling of 1986844 in words is "one million, nine hundred eighty-six thousand, eight hundred forty-four".