840665112 has 32 divisors (see below), whose sum is σ = 2401900800. Its totient is φ = 240189984.

The previous prime is 840665101. The next prime is 840665131. The reversal of 840665112 is 211566048.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2501812 + ... + 2502147.

It is an arithmetic number, because the mean of its divisors is an integer number (75059400).

Almost surely, 2^840665112 is an apocalyptic number.

It is an amenable number.

840665112 is an abundant number, since it is smaller than the sum of its proper divisors (1561235688).

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

840665112 is a wasteful number, since it uses less digits than its factorization.

840665112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5003975 (or 5003971 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 840665112 is about 28994.2254940531. The cubic root of 840665112 is about 943.7877617041.

The spelling of 840665112 in words is "eight hundred forty million, six hundred sixty-five thousand, one hundred twelve".