1999842804 has 48 divisors (see below), whose sum is σ = 5489769600. Its totient is φ = 627401088.

The previous prime is 1999842797. The next prime is 1999842827. The reversal of 1999842804 is 4082489991.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 15 ways as a sum of consecutive naturals, for example, 542784 + ... + 546455.

It is an arithmetic number, because the mean of its divisors is an integer number (114370200).

Almost surely, 2^1999842804 is an apocalyptic number.

It is an amenable number.

1999842804 is an abundant number, since it is smaller than the sum of its proper divisors (3489926796).

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

1999842804 is a wasteful number, since it uses less digits than its factorization.

1999842804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089269 (or 1089261 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The square root of 1999842804 is about 44719.6020107514. The cubic root of 1999842804 is about 1259.8880399385. Note that the first 3 decimals are identical.

The spelling of 1999842804 in words is "one billion, nine hundred ninety-nine million, eight hundred forty-two thousand, eight hundred four".