3888821667 has 8 divisors (see below), whose sum is σ = 5232665680. Its totient is φ = 2568762720.

The previous prime is 3888821641. The next prime is 3888821687. The reversal of 3888821667 is 7661288883.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3888821667 - 2⁷ = 3888821539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3888821687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5945884 + ... + 5946537.

It is an arithmetic number, because the mean of its divisors is an integer number (654083210).

Almost surely, 2^3888821667 is an apocalyptic number.

3888821667 is a deficient number, since it is larger than the sum of its proper divisors (1343844013).

3888821667 is a wasteful number, since it uses less digits than its factorization.

3888821667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11892533.

The product of its digits is 6193152, while the sum is 57.

The square root of 3888821667 is about 62360.4174697380. The cubic root of 3888821667 is about 1572.5555991304. Note that the first 4 decimals are identical.

The spelling of 3888821667 in words is "three billion, eight hundred eighty-eight million, eight hundred twenty-one thousand, six hundred sixty-seven".