840318 has 8 divisors (see below), whose sum is σ = 1680648. Its totient is φ = 280104.

The previous prime is 840299. The next prime is 840319. The reversal of 840318 is 813048.

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

840318 is an admirable number.

It is a super-2 number, since 2×840318² = 1412268682248, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 840318.

It is not an unprimeable number, because it can be changed into a prime (840319) by changing a digit.

840318 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 3 ways as a sum of consecutive naturals, for example, 70021 + ... + 70032.

It is an arithmetic number, because the mean of its divisors is an integer number (210081).

2⁸⁴⁰³¹⁸ is an apocalyptic number.

840318 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.

840318 is a wasteful number, since it uses less digits than its factorization.

840318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140058.

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

The square root of 840318 is about 916.6886057981. The cubic root of 840318 is about 94.3657846651.

The spelling of 840318 in words is "eight hundred forty thousand, three hundred eighteen".