1989782 has 16 divisors (see below), whose sum is σ = 3236112. Its totient is φ = 913920.

The previous prime is 1989769. The next prime is 1989787. The reversal of 1989782 is 2879891.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989787) 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, 782 + ... + 2142.

It is an arithmetic number, because the mean of its divisors is an integer number (202257).

2^1989782 is an apocalyptic number.

1989782 is a deficient number, since it is larger than the sum of its proper divisors (1246330).

1989782 is a wasteful number, since it uses less digits than its factorization.

1989782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1423.

The product of its digits is 72576, while the sum is 44.

The square root of 1989782 is about 1410.5963277990. The cubic root of 1989782 is about 125.7771739906. Note that the first 3 decimals are identical.

The spelling of 1989782 in words is "one million, nine hundred eighty-nine thousand, seven hundred eighty-two".