840086 has 16 divisors (see below), whose sum is σ = 1377600. Its totient is φ = 381888.

The previous prime is 840083. The next prime is 840109. The reversal of 840086 is 680048.

840086 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840083) 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, 1850 + ... + 2258.

It is an arithmetic number, because the mean of its divisors is an integer number (86100).

2⁸⁴⁰⁰⁸⁶ is an apocalyptic number.

840086 is a deficient number, since it is larger than the sum of its proper divisors (537514).

840086 is a wasteful number, since it uses less digits than its factorization.

840086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 840086 is about 916.5620546368. The cubic root of 840086 is about 94.3570995098.

The spelling of 840086 in words is "eight hundred forty thousand, eighty-six".