3971335212 has 144 divisors (see below), whose sum is σ = 11013882880. Its totient is φ = 1199245824.

The previous prime is 3971335211. The next prime is 3971335237. The reversal of 3971335212 is 2125331793.

It is a happy number.

3971335212 is a `hidden beast` number, since 39 + 71 + 33 + 521 + 2 = 666.

3971335212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (3971335211) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6478218 + ... + 6478830.

Almost surely, 2^3971335212 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 3971335212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5506941440).

3971335212 is an abundant number, since it is smaller than the sum of its proper divisors (7042547668).

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

3971335212 is a wasteful number, since it uses less digits than its factorization.

3971335212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872 (or 867 counting only the distinct ones).

The product of its digits is 34020, while the sum is 36.

The square root of 3971335212 is about 63018.5307032781. The cubic root of 3971335212 is about 1583.6000817379.

The spelling of 3971335212 in words is "three billion, nine hundred seventy-one million, three hundred thirty-five thousand, two hundred twelve".