1989211424 has 12 divisors (see below), whose sum is σ = 3916260054. Its totient is φ = 994605696.

The previous prime is 1989211421. The next prime is 1989211447. The reversal of 1989211424 is 4241129891.

It can be written as a sum of positive squares in only one way, i.e., 1719595024 + 269616400 = 41468^2 + 16420^2 .

It is not an unprimeable number, because it can be changed into a prime (1989211421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31081397 + ... + 31081460.

Almost surely, 2^1989211424 is an apocalyptic number.

It is an amenable number.

1989211424 is a deficient number, since it is larger than the sum of its proper divisors (1927048630).

1989211424 is an equidigital number, since it uses as much as digits as its factorization.

1989211424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62162867 (or 62162859 counting only the distinct ones).

The product of its digits is 41472, while the sum is 41.

The square root of 1989211424 is about 44600.5764985162. The cubic root of 1989211424 is about 1257.6515051303.

The spelling of 1989211424 in words is "one billion, nine hundred eighty-nine million, two hundred eleven thousand, four hundred twenty-four".