3917208816 has 80 divisors (see below), whose sum is σ = 11905264800. Its totient is φ = 1228925952.

The previous prime is 3917208811. The next prime is 3917208829. The reversal of 3917208816 is 6188027193.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3917208811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259351 + ... + 274038.

It is an arithmetic number, because the mean of its divisors is an integer number (148815810).

Almost surely, 2^3917208816 is an apocalyptic number.

3917208816 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3917208816 is an abundant number, since it is smaller than the sum of its proper divisors (7988055984).

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

3917208816 is a wasteful number, since it uses less digits than its factorization.

3917208816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533423 (or 533411 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 3917208816 is about 62587.6091251296. The cubic root of 3917208816 is about 1576.3727098269.

The spelling of 3917208816 in words is "three billion, nine hundred seventeen million, two hundred eight thousand, eight hundred sixteen".