840301805688 has 32 divisors (see below), whose sum is σ = 2101039112400. Its totient is φ = 280062655488.

The previous prime is 840301805687. The next prime is 840301805701. The reversal of 840301805688 is 886508103048.

It is a super-2 number, since 2×840301805688² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 840301805688.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840301805687) 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, 2190523 + ... + 2545386.

Almost surely, 2^840301805688 is an apocalyptic number.

It is an amenable number.

840301805688 is an abundant number, since it is smaller than the sum of its proper divisors (1260737306712).

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

840301805688 is a wasteful number, since it uses less digits than its factorization.

840301805688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4743311 (or 4743307 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 51.

The spelling of 840301805688 in words is "eight hundred forty billion, three hundred one million, eight hundred five thousand, six hundred eighty-eight".