1989104 has 40 divisors (see below), whose sum is σ = 4239312. Its totient is φ = 898560.

The previous prime is 1989101. The next prime is 1989107. The reversal of 1989104 is 4019891.

It is an interprime number because it is at equal distance from previous prime (1989101) and next prime (1989107).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989101) 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, 15119 + ... + 15249.

2^1989104 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 1989104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2119656).

1989104 is an abundant number, since it is smaller than the sum of its proper divisors (2250208).

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

1989104 is a wasteful number, since it uses less digits than its factorization.

1989104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 1989104 is about 1410.3559834311. The cubic root of 1989104 is about 125.7628865608.

The spelling of 1989104 in words is "one million, nine hundred eighty-nine thousand, one hundred four".