1989306 has 64 divisors (see below), whose sum is σ = 5132160. Its totient is φ = 564480.

The previous prime is 1989277. The next prime is 1989307. The reversal of 1989306 is 6039891.

It is not an unprimeable number, because it can be changed into a prime (1989307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10000 + ... + 10196.

It is an arithmetic number, because the mean of its divisors is an integer number (80190).

2^1989306 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1989306, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2566080).

1989306 is an abundant number, since it is smaller than the sum of its proper divisors (3142854).

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

1989306 is a wasteful number, since it uses less digits than its factorization.

1989306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236 (or 230 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 1989306 is about 1410.4275947386. The cubic root of 1989306 is about 125.7671436272.

The spelling of 1989306 in words is "one million, nine hundred eighty-nine thousand, three hundred six".