3991246336 has 160 divisors (see below), whose sum is σ = 10288270080. Its totient is φ = 1500979200.

The previous prime is 3991246331. The next prime is 3991246339. The reversal of 3991246336 is 6336421993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3991246331) 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, 1141551 + ... + 1145041.

It is an arithmetic number, because the mean of its divisors is an integer number (64301688).

Almost surely, 2^3991246336 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 3991246336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5144135040).

3991246336 is an abundant number, since it is smaller than the sum of its proper divisors (6297023744).

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

3991246336 is a wasteful number, since it uses less digits than its factorization.

3991246336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3556 (or 3540 counting only the distinct ones).

The product of its digits is 629856, while the sum is 46.

The square root of 3991246336 is about 63176.3115099323. The cubic root of 3991246336 is about 1586.2422416168.

The spelling of 3991246336 in words is "three billion, nine hundred ninety-one million, two hundred forty-six thousand, three hundred thirty-six".