840082040 has 128 divisors (see below), whose sum is σ = 2239142400. Its totient is φ = 277655040.

The previous prime is 840082031. The next prime is 840082043. The reversal of 840082040 is 40280048.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840082043) 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, 1356851 + ... + 1357469.

It is an arithmetic number, because the mean of its divisors is an integer number (17493300).

Almost surely, 2^840082040 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 840082040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1119571200).

840082040 is an abundant number, since it is smaller than the sum of its proper divisors (1399060360).

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

840082040 is a wasteful number, since it uses less digits than its factorization.

840082040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805 (or 801 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The square root of 840082040 is about 28984.1687822853. The cubic root of 840082040 is about 943.5695124930.

The spelling of 840082040 in words is "eight hundred forty million, eighty-two thousand, forty".