818340 has 48 divisors (see below), whose sum is σ = 2395008. Its totient is φ = 208384.

The previous prime is 818339. The next prime is 818341. The reversal of 818340 is 43818.

818340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (818339) and next prime (818341).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 818340.

It is not an unprimeable number, because it can be changed into a prime (818341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1084 + ... + 1676.

It is an arithmetic number, because the mean of its divisors is an integer number (49896).

2⁸¹⁸³⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 818340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1197504).

818340 is an abundant number, since it is smaller than the sum of its proper divisors (1576668).

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

818340 is a wasteful number, since it uses less digits than its factorization.

818340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628 (or 626 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 818340 is about 904.6214677974. The cubic root of 818340 is about 93.5358132513.

The spelling of 818340 in words is "eight hundred eighteen thousand, three hundred forty".