840046 has 8 divisors (see below), whose sum is σ = 1279080. Its totient is φ = 413688.

The previous prime is 840023. The next prime is 840053. The reversal of 840046 is 640048.

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

It is a junction number, because it is equal to n+sod(n) for n = 839999 and 840026.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3001 + ... + 3268.

It is an arithmetic number, because the mean of its divisors is an integer number (159885).

2⁸⁴⁰⁰⁴⁶ is an apocalyptic number.

840046 is a deficient number, since it is larger than the sum of its proper divisors (439034).

840046 is a wasteful number, since it uses less digits than its factorization.

840046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6338.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 840046 is about 916.5402337050. The cubic root of 840046 is about 94.3556019076.

The spelling of 840046 in words is "eight hundred forty thousand, forty-six".