3971701944 has 128 divisors (see below), whose sum is σ = 12786508800. Its totient is φ = 1118759040.

The previous prime is 3971701897. The next prime is 3971701949. The reversal of 3971701944 is 4491071793.

3971701944 is a `hidden beast` number, since 397 + 1 + 70 + 194 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 3971701944.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3971701949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88854 + ... + 125850.

It is an arithmetic number, because the mean of its divisors is an integer number (99894600).

Almost surely, 2^3971701944 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 3971701944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6393254400).

3971701944 is an abundant number, since it is smaller than the sum of its proper divisors (8814806856).

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

3971701944 is a wasteful number, since it uses less digits than its factorization.

3971701944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37090 (or 37080 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 3971701944 is about 63021.4403516771. The cubic root of 3971701944 is about 1583.6488259610.

The spelling of 3971701944 in words is "three billion, nine hundred seventy-one million, seven hundred one thousand, nine hundred forty-four".