3931884740784 has 320 divisors, whose sum is σ = 13970503830528. Its totient is φ = 919716249600.

The previous prime is 3931884740723. The next prime is 3931884740801. The reversal of 3931884740784 is 4870474881393.

It is a super-2 number, since 2×3931884740784² (a number of 26 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 972012 + ... + 2967924.

Almost surely, 2^{3931884740784} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3931884740784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6985251915264).

3931884740784 is an abundant number, since it is smaller than the sum of its proper divisors (10038619089744).

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

3931884740784 is a wasteful number, since it uses less digits than its factorization.

3931884740784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1995996 (or 1995990 counting only the distinct ones).

The product of its (nonzero) digits is 130056192, while the sum is 66.

The spelling of 3931884740784 in words is "three trillion, nine hundred thirty-one billion, eight hundred eighty-four million, seven hundred forty thousand, seven hundred eighty-four".