981318 has 32 divisors (see below), whose sum is σ = 2209536. Its totient is φ = 288288.

The previous prime is 981311. The next prime is 981319. The reversal of 981318 is 813189.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981311) by changing a digit.

981318 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1521 + ... + 2067.

It is an arithmetic number, because the mean of its divisors is an integer number (69048).

2⁹⁸¹³¹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 981318, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1104768).

981318 is an abundant number, since it is smaller than the sum of its proper divisors (1228218).

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

981318 is a wasteful number, since it uses less digits than its factorization.

981318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588.

The product of its digits is 1728, while the sum is 30.

The square root of 981318 is about 990.6149605170. The cubic root of 981318 is about 99.3733479414.

The spelling of 981318 in words is "nine hundred eighty-one thousand, three hundred eighteen".