840674 has 8 divisors (see below), whose sum is σ = 1327440. Its totient is φ = 398196.

The previous prime is 840661. The next prime is 840683. The reversal of 840674 is 476048.

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

It is a Curzon 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, 11024 + ... + 11099.

It is an arithmetic number, because the mean of its divisors is an integer number (165930).

2⁸⁴⁰⁶⁷⁴ is an apocalyptic number.

840674 is a deficient number, since it is larger than the sum of its proper divisors (486766).

840674 is a wasteful number, since it uses less digits than its factorization.

840674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22144.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 840674 is about 916.8827624075. The cubic root of 840674 is about 94.3791087783.

The spelling of 840674 in words is "eight hundred forty thousand, six hundred seventy-four".