1989836 has 12 divisors (see below), whose sum is σ = 3510528. Its totient is φ = 986832.

The previous prime is 1989811. The next prime is 1989847. The reversal of 1989836 is 6389891.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1451 + ... + 2466.

It is an arithmetic number, because the mean of its divisors is an integer number (292544).

2^1989836 is an apocalyptic number.

It is an amenable number.

1989836 is a deficient number, since it is larger than the sum of its proper divisors (1520692).

1989836 is a wasteful number, since it uses less digits than its factorization.

1989836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4048 (or 4046 counting only the distinct ones).

The product of its digits is 93312, while the sum is 44.

The square root of 1989836 is about 1410.6154685101. The cubic root of 1989836 is about 125.7783117879.

The spelling of 1989836 in words is "one million, nine hundred eighty-nine thousand, eight hundred thirty-six".