3818816208 has 60 divisors (see below), whose sum is σ = 10889051940. Its totient is φ = 1248918528.

The previous prime is 3818816203. The next prime is 3818816249. The reversal of 3818816208 is 8026188183.

3818816208 is a `hidden beast` number, since 3 + 8 + 18 + 8 + 1 + 620 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1475481744 + 2343334464 = 38412^2 + 48408^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3818816203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 242553 + ... + 257816.

It is an arithmetic number, because the mean of its divisors is an integer number (181484199).

Almost surely, 2^3818816208 is an apocalyptic number.

It is an amenable number.

3818816208 is an abundant number, since it is smaller than the sum of its proper divisors (7070235732).

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

3818816208 is a wasteful number, since it uses less digits than its factorization.

3818816208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500436 (or 500427 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 45.

The square root of 3818816208 is about 61796.5711670154. The cubic root of 3818816208 is about 1563.0621706451.

The spelling of 3818816208 in words is "three billion, eight hundred eighteen million, eight hundred sixteen thousand, two hundred eight".