1989712 has 20 divisors (see below), whose sum is σ = 3960436. Its totient is φ = 967680.

The previous prime is 1989683. The next prime is 1989721. The reversal of 1989712 is 2179891.

It can be written as a sum of positive squares in 2 ways, for example, as 1648656 + 341056 = 1284^2 + 584^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a plaindrome in base 11.

It is a congruent 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, 1089 + ... + 2272.

2^1989712 is an apocalyptic number.

It is an amenable number.

1989712 is a deficient number, since it is larger than the sum of its proper divisors (1970724).

1989712 is a wasteful number, since it uses less digits than its factorization.

1989712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3406 (or 3400 counting only the distinct ones).

The product of its digits is 9072, while the sum is 37.

The square root of 1989712 is about 1410.5715153795. The cubic root of 1989712 is about 125.7756990375.

It can be divided in two parts, 1989 and 712, that added together give a triangular number (2701 = T₇₃).

The spelling of 1989712 in words is "one million, nine hundred eighty-nine thousand, seven hundred twelve".