1999380468 has 12 divisors (see below), whose sum is σ = 4665221120. Its totient is φ = 666460152.

The previous prime is 1999380419. The next prime is 1999380521. The reversal of 1999380468 is 8640839991.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83307508 + ... + 83307531.

Almost surely, 2^1999380468 is an apocalyptic number.

It is an amenable number.

1999380468 is an abundant number, since it is smaller than the sum of its proper divisors (2665840652).

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

1999380468 is a wasteful number, since it uses less digits than its factorization.

1999380468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166615046 (or 166615044 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 57.

The square root of 1999380468 is about 44714.4324351769. The cubic root of 1999380468 is about 1259.7909428917.

The spelling of 1999380468 in words is "one billion, nine hundred ninety-nine million, three hundred eighty thousand, four hundred sixty-eight".