840342186 has 48 divisors (see below), whose sum is σ = 1850769024. Its totient is φ = 275532192.

The previous prime is 840342179. The next prime is 840342199. The reversal of 840342186 is 681243048.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 840342186.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 289635 + ... + 292521.

It is an arithmetic number, because the mean of its divisors is an integer number (38557688).

Almost surely, 2^840342186 is an apocalyptic number.

840342186 is an abundant number, since it is smaller than the sum of its proper divisors (1010426838).

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

840342186 is a wasteful number, since it uses less digits than its factorization.

840342186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3155 (or 3152 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 840342186 is about 28988.6561606433. The cubic root of 840342186 is about 943.6669000058. Note that the first 3 decimals are identical.

The spelling of 840342186 in words is "eight hundred forty million, three hundred forty-two thousand, one hundred eighty-six".