816109236 has 48 divisors (see below), whose sum is σ = 2129359680. Its totient is φ = 270298080.

The previous prime is 816109139. The next prime is 816109241. The reversal of 816109236 is 632901618.

816109236 is a `hidden beast` number, since 8 + 1 + 610 + 9 + 2 + 36 = 666.

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

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 816109236.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7110 + ... + 41021.

It is an arithmetic number, because the mean of its divisors is an integer number (44361660).

Almost surely, 2^816109236 is an apocalyptic number.

It is an amenable number.

816109236 is an abundant number, since it is smaller than the sum of its proper divisors (1313250444).

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

816109236 is a wasteful number, since it uses less digits than its factorization.

816109236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48301 (or 48293 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 816109236 is about 28567.6256626273. The cubic root of 816109236 is about 934.5074420541.

The spelling of 816109236 in words is "eight hundred sixteen million, one hundred nine thousand, two hundred thirty-six".