840034 has 8 divisors (see below), whose sum is σ = 1357020. Its totient is φ = 387696.

The previous prime is 840023. The next prime is 840053. The reversal of 840034 is 430048.

It can be written as a sum of positive squares in 2 ways, for example, as 837225 + 2809 = 915^2 + 53^2 .

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 = 839993 and 840020.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16129 + ... + 16180.

2⁸⁴⁰⁰³⁴ is an apocalyptic number.

840034 is a deficient number, since it is larger than the sum of its proper divisors (516986).

840034 is a wasteful number, since it uses less digits than its factorization.

840034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32324.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 840034 is about 916.5336873241. The cubic root of 840034 is about 94.3551526177.

The spelling of 840034 in words is "eight hundred forty thousand, thirty-four".