805117236 has 72 divisors (see below), whose sum is σ = 2384002656. Its totient is φ = 209119680.

The previous prime is 805117217. The next prime is 805117237. The reversal of 805117236 is 632711508.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 805117197 and 805117206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805117237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55771 + ... + 68706.

It is an arithmetic number, because the mean of its divisors is an integer number (33111148).

Almost surely, 2^805117236 is an apocalyptic number.

It is an amenable number.

805117236 is an abundant number, since it is smaller than the sum of its proper divisors (1578885420).

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

805117236 is a wasteful number, since it uses less digits than its factorization.

805117236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124509 (or 124500 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 805117236 is about 28374.5878560377. The cubic root of 805117236 is about 930.2929034624.

The spelling of 805117236 in words is "eight hundred five million, one hundred seventeen thousand, two hundred thirty-six".