840986 has 8 divisors (see below), whose sum is σ = 1283040. Its totient is φ = 413308.

The previous prime is 840979. The next prime is 840989. The reversal of 840986 is 689048.

840986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (840989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3446 + ... + 3681.

It is an arithmetic number, because the mean of its divisors is an integer number (160380).

2⁸⁴⁰⁹⁸⁶ is an apocalyptic number.

840986 is a deficient number, since it is larger than the sum of its proper divisors (442054).

840986 is a wasteful number, since it uses less digits than its factorization.

840986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7188.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 840986 is about 917.0528883331. The cubic root of 840986 is about 94.3907829984.

The spelling of 840986 in words is "eight hundred forty thousand, nine hundred eighty-six".