840041636 has 96 divisors (see below), whose sum is σ = 1792116480. Its totient is φ = 337042944.

The previous prime is 840041617. The next prime is 840041639. The reversal of 840041636 is 636140048.

It is not an unprimeable number, because it can be changed into a prime (840041639) 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, 4855646 + ... + 4855818.

It is an arithmetic number, because the mean of its divisors is an integer number (18667880).

Almost surely, 2^840041636 is an apocalyptic number.

840041636 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 840041636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (896058240).

840041636 is an abundant number, since it is smaller than the sum of its proper divisors (952074844).

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

840041636 is a wasteful number, since it uses less digits than its factorization.

840041636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 840041636 is about 28983.4717727190. The cubic root of 840041636 is about 943.5543851634.

The spelling of 840041636 in words is "eight hundred forty million, forty-one thousand, six hundred thirty-six".