836855040 has 288 divisors, whose sum is σ = 3089350656. Its totient is φ = 189112320.

The previous prime is 836855009. The next prime is 836855051. The reversal of 836855040 is 40558638.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 836855040.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4381345 + ... + 4381535.

It is an arithmetic number, because the mean of its divisors is an integer number (10726912).

Almost surely, 2^836855040 is an apocalyptic number.

836855040 is a gapful number since it is divisible by the number (80) 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 836855040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1544675328).

836855040 is an abundant number, since it is smaller than the sum of its proper divisors (2252495616).

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

836855040 is a wasteful number, since it uses less digits than its factorization.

836855040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 39.

The square root of 836855040 is about 28928.4468992029. The cubic root of 836855040 is about 942.3597870160.

The spelling of 836855040 in words is "eight hundred thirty-six million, eight hundred fifty-five thousand, forty".