1990735912 has 64 divisors (see below), whose sum is σ = 4192119360. Its totient is φ = 878438400.

The previous prime is 1990735889. The next prime is 1990735927. The reversal of 1990735912 is 2195370991.

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 15 ways as a sum of consecutive naturals, for example, 653112 + ... + 656152.

It is an arithmetic number, because the mean of its divisors is an integer number (65501865).

Almost surely, 2^1990735912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1990735912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2096059680).

1990735912 is an abundant number, since it is smaller than the sum of its proper divisors (2201383448).

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

1990735912 is a wasteful number, since it uses less digits than its factorization.

1990735912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3274 (or 3270 counting only the distinct ones).

The product of its (nonzero) digits is 153090, while the sum is 46.

The square root of 1990735912 is about 44617.6636770685. The cubic root of 1990735912 is about 1257.9727019334.

The spelling of 1990735912 in words is "one billion, nine hundred ninety million, seven hundred thirty-five thousand, nine hundred twelve".