1989136 has 40 divisors (see below), whose sum is σ = 4178304. Its totient is φ = 913920.

The previous prime is 1989133. The next prime is 1989151. The reversal of 1989136 is 6319891.

It is a junction number, because it is equal to n+sod(n) for n = 1989095 and 1989104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989131) 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, 19261 + ... + 19363.

2^1989136 is an apocalyptic number.

1989136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1989136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2089152).

1989136 is an abundant number, since it is smaller than the sum of its proper divisors (2189168).

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

1989136 is a wasteful number, since it uses less digits than its factorization.

1989136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 193 counting only the distinct ones).

The product of its digits is 11664, while the sum is 37.

The square root of 1989136 is about 1410.3673280390. The cubic root of 1989136 is about 125.7635609668.

The spelling of 1989136 in words is "one million, nine hundred eighty-nine thousand, one hundred thirty-six".