840643332 has 24 divisors (see below), whose sum is σ = 1962897216. Its totient is φ = 280015008.

The previous prime is 840643327. The next prime is 840643333. The reversal of 840643332 is 233346048.

It is a junction number, because it is equal to n+sod(n) for n = 840643293 and 840643302.

It is not an unprimeable number, because it can be changed into a prime (840643333) 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, 6843 + ... + 41570.

It is an arithmetic number, because the mean of its divisors is an integer number (81787384).

Almost surely, 2^840643332 is an apocalyptic number.

It is an amenable number.

840643332 is an abundant number, since it is smaller than the sum of its proper divisors (1122253884).

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

840643332 is a wasteful number, since it uses less digits than its factorization.

840643332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49867 (or 49865 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 33.

The square root of 840643332 is about 28993.8498995908. The cubic root of 840643332 is about 943.7796110645.

The spelling of 840643332 in words is "eight hundred forty million, six hundred forty-three thousand, three hundred thirty-two".