3971478844 has 24 divisors (see below), whose sum is σ = 6977456640. Its totient is φ = 1977934896.

The previous prime is 3971478829. The next prime is 3971478877. The reversal of 3971478844 is 4488741793.

It is a happy number.

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, 1798389 + ... + 1800595.

It is an arithmetic number, because the mean of its divisors is an integer number (290727360).

Almost surely, 2^3971478844 is an apocalyptic number.

It is an amenable number.

3971478844 is a deficient number, since it is larger than the sum of its proper divisors (3005977796).

3971478844 is a wasteful number, since it uses less digits than its factorization.

3971478844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3777 (or 3775 counting only the distinct ones).

The product of its digits is 5419008, while the sum is 55.

The square root of 3971478844 is about 63019.6702942819. The cubic root of 3971478844 is about 1583.6191729581.

The spelling of 3971478844 in words is "three billion, nine hundred seventy-one million, four hundred seventy-eight thousand, eight hundred forty-four".