1999230996 has 72 divisors (see below), whose sum is σ = 5626729920. Its totient is φ = 541137024.

The previous prime is 1999230979. The next prime is 1999231051. The reversal of 1999230996 is 6990329991.

It is a Harshad number since it is a multiple of its sum of digits (57).

1999230996 is a modest number, since divided by 30996 gives 19992 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2641 + ... + 63288.

Almost surely, 2^1999230996 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 1999230996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2813364960).

1999230996 is an abundant number, since it is smaller than the sum of its proper divisors (3627498924).

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

1999230996 is a wasteful number, since it uses less digits than its factorization.

1999230996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65981 (or 65960 counting only the distinct ones).

The product of its (nonzero) digits is 2125764, while the sum is 57.

The square root of 1999230996 is about 44712.7609972813. The cubic root of 1999230996 is about 1259.7595484727.

The spelling of 1999230996 in words is "one billion, nine hundred ninety-nine million, two hundred thirty thousand, nine hundred ninety-six".