1989306912 has 24 divisors (see below), whose sum is σ = 5221930896. Its totient is φ = 663102272.

The previous prime is 1989306863. The next prime is 1989306923. The reversal of 1989306912 is 2196039891.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (48).

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 in 3 ways as a sum of consecutive naturals, for example, 10360878 + ... + 10361069.

It is an arithmetic number, because the mean of its divisors is an integer number (217580454).

Almost surely, 2^1989306912 is an apocalyptic number.

1989306912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1989306912 is an abundant number, since it is smaller than the sum of its proper divisors (3232623984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1989306912 is a wasteful number, since it uses less digits than its factorization.

1989306912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20721960 (or 20721952 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 48.

The square root of 1989306912 is about 44601.6469651066. The cubic root of 1989306912 is about 1257.6716284656.

The spelling of 1989306912 in words is "one billion, nine hundred eighty-nine million, three hundred six thousand, nine hundred twelve".