842682840 has 128 divisors (see below), whose sum is σ = 2634508800. Its totient is φ = 215444480.

The previous prime is 842682839. The next prime is 842682847. The reversal of 842682840 is 48286248.

It is a Cunningham number, because it is equal to 29029²-1.

It is a super-2 number, since 2×842682840² = 1420228737660931200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 842682792 and 842682801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842682847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 288829 + ... + 291731.

It is an arithmetic number, because the mean of its divisors is an integer number (20582100).

Almost surely, 2^842682840 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 842682840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1317254400).

842682840 is an abundant number, since it is smaller than the sum of its proper divisors (1791825960).

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

842682840 is a wasteful number, since it uses less digits than its factorization.

842682840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3017 (or 3013 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 42.

The square root of 842682840 is about 29028.9999827758. Note that the first 4 decimals coincide. The cubic root of 842682840 is about 944.5422379115.

The spelling of 842682840 in words is "eight hundred forty-two million, six hundred eighty-two thousand, eight hundred forty".