3884757921 has 32 divisors (see below), whose sum is σ = 6286118400. Its totient is φ = 2351503440.

The previous prime is 3884757911. The next prime is 3884757967. The reversal of 3884757921 is 1297574883.

It is a happy number.

3884757921 is a `hidden beast` number, since 3 + 8 + 8 + 47 + 579 + 21 = 666.

It is not a de Polignac number, because 3884757921 - 2²⁶ = 3817649057 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3884757911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 247510 + ... + 262736.

It is an arithmetic number, because the mean of its divisors is an integer number (196441200).

Almost surely, 2^3884757921 is an apocalyptic number.

It is an amenable number.

3884757921 is a deficient number, since it is larger than the sum of its proper divisors (2401360479).

3884757921 is a wasteful number, since it uses less digits than its factorization.

3884757921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16106 (or 16100 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The square root of 3884757921 is about 62327.8262175090. The cubic root of 3884757921 is about 1572.0076444765.

The spelling of 3884757921 in words is "three billion, eight hundred eighty-four million, seven hundred fifty-seven thousand, nine hundred twenty-one".