840208 has 20 divisors (see below), whose sum is σ = 1724220. Its totient is φ = 395264.

The previous prime is 840197. The next prime is 840223. The reversal of 840208 is 802048.

It can be written as a sum of positive squares in 2 ways, for example, as 719104 + 121104 = 848^2 + 348^2 .

It is an unprimeable number.

840208 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1273 + ... + 1816.

It is an arithmetic number, because the mean of its divisors is an integer number (86211).

2⁸⁴⁰²⁰⁸ is an apocalyptic number.

It is an amenable number.

840208 is an abundant number, since it is smaller than the sum of its proper divisors (884012).

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

840208 is a wasteful number, since it uses less digits than its factorization.

840208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3114 (or 3108 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 840208 is about 916.6286052704. The cubic root of 840208 is about 94.3616669029.

The spelling of 840208 in words is "eight hundred forty thousand, two hundred eight".