1989272 has 16 divisors (see below), whose sum is σ = 3949560. Its totient is φ = 936064.

The previous prime is 1989263. The next prime is 1989277. The reversal of 1989272 is 2729891.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7178 + ... + 7449.

2^1989272 is an apocalyptic number.

It is an amenable number.

1989272 is a deficient number, since it is larger than the sum of its proper divisors (1960288).

1989272 is a wasteful number, since it uses less digits than its factorization.

1989272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14650 (or 14646 counting only the distinct ones).

The product of its digits is 18144, while the sum is 38.

The square root of 1989272 is about 1410.4155416047. The cubic root of 1989272 is about 125.7664271114.

The spelling of 1989272 in words is "one million, nine hundred eighty-nine thousand, two hundred seventy-two".