1983999804 has 12 divisors (see below), whose sum is σ = 4629332904. Its totient is φ = 661333264.

The previous prime is 1983999769. The next prime is 1983999821. The reversal of 1983999804 is 4089993891.

It is a happy number.

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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82666647 + ... + 82666670.

It is an arithmetic number, because the mean of its divisors is an integer number (385777742).

Almost surely, 2^1983999804 is an apocalyptic number.

It is an amenable number.

1983999804 is an abundant number, since it is smaller than the sum of its proper divisors (2645333100).

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

1983999804 is a wasteful number, since it uses less digits than its factorization.

1983999804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165333324 (or 165333322 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 60.

The square root of 1983999804 is about 44542.1127024752. The cubic root of 1983999804 is about 1256.5522195782.

The spelling of 1983999804 in words is "one billion, nine hundred eighty-three million, nine hundred ninety-nine thousand, eight hundred four".