840849 has 8 divisors (see below), whose sum is σ = 1126752. Its totient is φ = 557760.

The previous prime is 840841. The next prime is 840859. The reversal of 840849 is 948048.

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

It is not a de Polignac number, because 840849 - 2³ = 840841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (840841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142 + ... + 1304.

It is an arithmetic number, because the mean of its divisors is an integer number (140844).

2⁸⁴⁰⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

840849 is a deficient number, since it is larger than the sum of its proper divisors (285903).

840849 is a wasteful number, since it uses less digits than its factorization.

840849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1407.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 840849 is about 916.9781894898. The cubic root of 840849 is about 94.3856571741.

The spelling of 840849 in words is "eight hundred forty thousand, eight hundred forty-nine".