1989212672 has 20 divisors (see below), whose sum is σ = 3974541186. Its totient is φ = 994606080.

The previous prime is 1989212669. The next prime is 1989212683. The reversal of 1989212672 is 2762129891.

It can be written as a sum of positive squares in only one way, i.e., 1601280256 + 387932416 = 40016^2 + 19696^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1942079 + ... + 1943102.

Almost surely, 2^1989212672 is an apocalyptic number.

It is an amenable number.

1989212672 is a deficient number, since it is larger than the sum of its proper divisors (1985328514).

1989212672 is an frugal number, since it uses more digits than its factorization.

1989212672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3885199 (or 3885183 counting only the distinct ones).

The product of its digits is 217728, while the sum is 47.

The square root of 1989212672 is about 44600.5904893646. The cubic root of 1989212672 is about 1257.6517681405.

The spelling of 1989212672 in words is "one billion, nine hundred eighty-nine million, two hundred twelve thousand, six hundred seventy-two".