816108380 has 24 divisors (see below), whose sum is σ = 1716528240. Its totient is φ = 325928960.

The previous prime is 816108361. The next prime is 816108407. The reversal of 816108380 is 83801618.

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 816108380.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19010 + ... + 44649.

It is an arithmetic number, because the mean of its divisors is an integer number (71522010).

Almost surely, 2^816108380 is an apocalyptic number.

It is an amenable number.

816108380 is an abundant number, since it is smaller than the sum of its proper divisors (900419860).

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

816108380 is a wasteful number, since it uses less digits than its factorization.

816108380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64309 (or 64307 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 816108380 is about 28567.6106806292. The cubic root of 816108380 is about 934.5071153255.

Adding to 816108380 its reverse (83801618), we get a palindrome (899909998).

The spelling of 816108380 in words is "eight hundred sixteen million, one hundred eight thousand, three hundred eighty".