840870 has 24 divisors (see below), whose sum is σ = 2186496. Its totient is φ = 224208.

The previous prime is 840863. The next prime is 840907. The reversal of 840870 is 78048.

It is a happy number.

840870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4582 + ... + 4761.

It is an arithmetic number, because the mean of its divisors is an integer number (91104).

2⁸⁴⁰⁸⁷⁰ is an apocalyptic number.

840870 is an abundant number, since it is smaller than the sum of its proper divisors (1345626).

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

840870 is a wasteful number, since it uses less digits than its factorization.

840870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9356 (or 9353 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 840870 is about 916.9896400723. The cubic root of 840870 is about 94.3864429205.

The spelling of 840870 in words is "eight hundred forty thousand, eight hundred seventy".