3974945856 has 168 divisors, whose sum is σ = 12345680160. Its totient is φ = 1125347328.

The previous prime is 3974945833. The next prime is 3974945869. The reversal of 3974945856 is 6585494793.

3974945856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (168).

It is a self number, because there is not a number n which added to its sum of digits gives 3974945856.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1061235 + ... + 1064973.

Almost surely, 2^3974945856 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 3974945856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6172840080).

3974945856 is an abundant number, since it is smaller than the sum of its proper divisors (8370734304).

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

3974945856 is a wasteful number, since it uses less digits than its factorization.

3974945856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3881 (or 3864 counting only the distinct ones).

The product of its digits is 32659200, while the sum is 60.

The square root of 3974945856 is about 63047.1716732797. The cubic root of 3974945856 is about 1584.0798602732.

The spelling of 3974945856 in words is "three billion, nine hundred seventy-four million, nine hundred forty-five thousand, eight hundred fifty-six".