840129086 has 8 divisors (see below), whose sum is σ = 1334322720. Its totient is φ = 395354848.

The previous prime is 840129053. The next prime is 840129091. The reversal of 840129086 is 680921048.

840129086 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 super-2 number, since 2×840129086² = 1411633762286390792, which contains 22 as substring.

It is a congruent number.

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, 12354806 + ... + 12354873.

It is an arithmetic number, because the mean of its divisors is an integer number (166790340).

Almost surely, 2^840129086 is an apocalyptic number.

840129086 is a deficient number, since it is larger than the sum of its proper divisors (494193634).

840129086 is a wasteful number, since it uses less digits than its factorization.

840129086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24709698.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 840129086 is about 28984.9803518995. The cubic root of 840129086 is about 943.5871259881.

The spelling of 840129086 in words is "eight hundred forty million, one hundred twenty-nine thousand, eighty-six".