3888821863 has 4 divisors (see below), whose sum is σ = 3901246528. Its totient is φ = 3876397200.

The previous prime is 3888821861. The next prime is 3888821873. The reversal of 3888821863 is 3681288883.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3888821863 - 2¹ = 3888821861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3888821861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6211863 + ... + 6212488.

It is an arithmetic number, because the mean of its divisors is an integer number (975311632).

Almost surely, 2^3888821863 is an apocalyptic number.

3888821863 is a deficient number, since it is larger than the sum of its proper divisors (12424665).

3888821863 is a wasteful number, since it uses less digits than its factorization.

3888821863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12424664.

The product of its digits is 3538944, while the sum is 55.

The square root of 3888821863 is about 62360.4190412476. The cubic root of 3888821863 is about 1572.5556255498. Note that the first 3 decimals are identical.

The spelling of 3888821863 in words is "three billion, eight hundred eighty-eight million, eight hundred twenty-one thousand, eight hundred sixty-three".