3931394416 has 40 divisors (see below), whose sum is σ = 7965204480. Its totient is φ = 1876222656.

The previous prime is 3931394371. The next prime is 3931394459. The reversal of 3931394416 is 6144931393.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

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, 165121 + ... + 187423.

It is an arithmetic number, because the mean of its divisors is an integer number (199130112).

Almost surely, 2^3931394416 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 3931394416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3982602240).

3931394416 is an abundant number, since it is smaller than the sum of its proper divisors (4033810064).

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

3931394416 is a wasteful number, since it uses less digits than its factorization.

3931394416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22813 (or 22807 counting only the distinct ones).

The product of its digits is 209952, while the sum is 43.

The square root of 3931394416 is about 62700.8326579480. The cubic root of 3931394416 is about 1578.2732853485.

The spelling of 3931394416 in words is "three billion, nine hundred thirty-one million, three hundred ninety-four thousand, four hundred sixteen".