840423700736 has 72 divisors (see below), whose sum is σ = 1706891746560. Its totient is φ = 412873168896.

The previous prime is 840423700733. The next prime is 840423700759. The reversal of 840423700736 is 637007324048.

It is not an unprimeable number, because it can be changed into a prime (840423700733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30994961 + ... + 31022063.

Almost surely, 2^840423700736 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 840423700736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (853445873280).

840423700736 is an abundant number, since it is smaller than the sum of its proper divisors (866468045824).

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

840423700736 is a wasteful number, since it uses less digits than its factorization.

840423700736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29231 (or 29217 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 44.

The spelling of 840423700736 in words is "eight hundred forty billion, four hundred twenty-three million, seven hundred thousand, seven hundred thirty-six".