3815388216 has 96 divisors (see below), whose sum is σ = 10499729760. Its totient is φ = 1251403776.

The previous prime is 3815388197. The next prime is 3815388253. The reversal of 3815388216 is 6128835183.

3815388216 is a `hidden beast` number, since 38 + 1 + 538 + 82 + 1 + 6 = 666.

It is a super-3 number, since 3×3815388216³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3904720 + ... + 3905696.

It is an arithmetic number, because the mean of its divisors is an integer number (109372185).

Almost surely, 2^3815388216 is an apocalyptic number.

3815388216 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3815388216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5249864880).

3815388216 is an abundant number, since it is smaller than the sum of its proper divisors (6684341544).

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

3815388216 is a wasteful number, since it uses less digits than its factorization.

3815388216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1805 (or 1798 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 3815388216 is about 61768.8288378532. The cubic root of 3815388216 is about 1562.5943320627.

The spelling of 3815388216 in words is "three billion, eight hundred fifteen million, three hundred eighty-eight thousand, two hundred sixteen".