1989356 has 6 divisors (see below), whose sum is σ = 3481380. Its totient is φ = 994676.

The previous prime is 1989353. The next prime is 1989401. The reversal of 1989356 is 6539891.

It is not an unprimeable number, because it can be changed into a prime (1989353) 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 as a sum of consecutive naturals, namely, 248666 + ... + 248673.

It is an arithmetic number, because the mean of its divisors is an integer number (580230).

2^1989356 is an apocalyptic number.

It is an amenable number.

1989356 is a deficient number, since it is larger than the sum of its proper divisors (1492024).

1989356 is a wasteful number, since it uses less digits than its factorization.

1989356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497343 (or 497341 counting only the distinct ones).

The product of its digits is 58320, while the sum is 41.

The square root of 1989356 is about 1410.4453197483. The cubic root of 1989356 is about 125.7681973120.

The spelling of 1989356 in words is "one million, nine hundred eighty-nine thousand, three hundred fifty-six".