3974689840 has 40 divisors (see below), whose sum is σ = 10081261008. Its totient is φ = 1445341440.

The previous prime is 3974689787. The next prime is 3974689841. The reversal of 3974689840 is 489864793.

3974689840 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 (40).

It is not an unprimeable number, because it can be changed into a prime (3974689841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2257467 + ... + 2259226.

Almost surely, 2^3974689840 is an apocalyptic number.

It is an amenable number.

3974689840 is an abundant number, since it is smaller than the sum of its proper divisors (6106571168).

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

3974689840 is a wasteful number, since it uses less digits than its factorization.

3974689840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4516717 (or 4516711 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 58.

The square root of 3974689840 is about 63045.1412878106. The cubic root of 3974689840 is about 1584.0458507117.

The spelling of 3974689840 in words is "three billion, nine hundred seventy-four million, six hundred eighty-nine thousand, eight hundred forty".