836403264 has 168 divisors, whose sum is σ = 2556342360. Its totient is φ = 260554752.

The previous prime is 836403263. The next prime is 836403311. The reversal of 836403264 is 462304638.

It is a happy number.

836403264 is a `hidden beast` number, since 8 + 3 + 640 + 3 + 2 + 6 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 449100864 + 387302400 = 21192^2 + 19680^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (836403263) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2242182 + ... + 2242554.

Almost surely, 2^836403264 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 836403264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1278171180).

836403264 is an abundant number, since it is smaller than the sum of its proper divisors (1719939096).

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

836403264 is a wasteful number, since it uses less digits than its factorization.

836403264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637 (or 624 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The square root of 836403264 is about 28920.6373373755. The cubic root of 836403264 is about 942.1901789203.

The spelling of 836403264 in words is "eight hundred thirty-six million, four hundred three thousand, two hundred sixty-four".