1999104 has 72 divisors (see below), whose sum is σ = 5641440. Its totient is φ = 626688.

The previous prime is 1999103. The next prime is 1999111. The reversal of 1999104 is 4019991.

It is not an unprimeable number, because it can be changed into a prime (1999103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14524 + ... + 14660.

2^1999104 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 1999104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2820720).

1999104 is an abundant number, since it is smaller than the sum of its proper divisors (3642336).

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

1999104 is a wasteful number, since it uses less digits than its factorization.

1999104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175 (or 161 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 1999104 is about 1413.8967430474. The cubic root of 1999104 is about 125.9732873581.

The spelling of 1999104 in words is "one million, nine hundred ninety-nine thousand, one hundred four".