1989318 has 8 divisors (see below), whose sum is σ = 3978648. Its totient is φ = 663104.

The previous prime is 1989307. The next prime is 1989329. The reversal of 1989318 is 8139891.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1989307) and next prime (1989329).

It is a sphenic number, since it is the product of 3 distinct primes.

1989318 is an admirable number.

It is a super-2 number, since 2×1989318² = 7914772210248, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165771 + ... + 165782.

It is an arithmetic number, because the mean of its divisors is an integer number (497331).

2^1989318 is an apocalyptic number.

1989318 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1989318 is a wasteful number, since it uses less digits than its factorization.

1989318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331558.

The product of its digits is 15552, while the sum is 39.

The square root of 1989318 is about 1410.4318487612. The cubic root of 1989318 is about 125.7673965132.

The spelling of 1989318 in words is "one million, nine hundred eighty-nine thousand, three hundred eighteen".