840867136 has 28 divisors (see below), whose sum is σ = 1670718528. Its totient is φ = 419898752.

The previous prime is 840867133. The next prime is 840867163. The reversal of 840867136 is 631768048.

It is a junction number, because it is equal to n+sod(n) for n = 840867092 and 840867101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840867133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44985 + ... + 60871.

Almost surely, 2^840867136 is an apocalyptic number.

It is an amenable number.

840867136 is a deficient number, since it is larger than the sum of its proper divisors (829851392).

840867136 is a wasteful number, since it uses less digits than its factorization.

840867136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16726 (or 16716 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 840867136 is about 28997.7091508967. The cubic root of 840867136 is about 943.8633576042.

The spelling of 840867136 in words is "eight hundred forty million, eight hundred sixty-seven thousand, one hundred thirty-six".