836243646 has 64 divisors (see below), whose sum is σ = 1989163008. Its totient is φ = 229402368.

The previous prime is 836243641. The next prime is 836243663. The reversal of 836243646 is 646342638.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 836243598 and 836243607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (836243641) 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, 100626 + ... + 108618.

It is an arithmetic number, because the mean of its divisors is an integer number (31080672).

Almost surely, 2^836243646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 836243646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (994581504).

836243646 is an abundant number, since it is smaller than the sum of its proper divisors (1152919362).

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

836243646 is a wasteful number, since it uses less digits than its factorization.

836243646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8105.

The product of its digits is 497664, while the sum is 42.

The square root of 836243646 is about 28917.8776192168. The cubic root of 836243646 is about 942.1302396995.

The spelling of 836243646 in words is "eight hundred thirty-six million, two hundred forty-three thousand, six hundred forty-six".