3781956384 has 72 divisors (see below), whose sum is σ = 11321004240. Its totient is φ = 1194300288.

The previous prime is 3781956371. The next prime is 3781956389. The reversal of 3781956384 is 4836591873.

3781956384 is a `hidden beast` number, since 3 + 78 + 1 + 9 + 563 + 8 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 3781956384.

It is not an unprimeable number, because it can be changed into a prime (3781956389) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 340102 + ... + 351045.

It is an arithmetic number, because the mean of its divisors is an integer number (157236170).

Almost surely, 2^3781956384 is an apocalyptic number.

It is an amenable number.

3781956384 is an abundant number, since it is smaller than the sum of its proper divisors (7539047856).

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

3781956384 is a wasteful number, since it uses less digits than its factorization.

3781956384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691182 (or 691171 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 3781956384 is about 61497.6128317189. The cubic root of 3781956384 is about 1558.0169279186.

The spelling of 3781956384 in words is "three billion, seven hundred eighty-one million, nine hundred fifty-six thousand, three hundred eighty-four".