3967888321 has 8 divisors (see below), whose sum is σ = 4027060800. Its totient is φ = 3908807280.

The previous prime is 3967888291. The next prime is 3967888343. The reversal of 3967888321 is 1238887693.

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

It is a cyclic number.

It is not a de Polignac number, because 3967888321 - 2⁷ = 3967888193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3967888391) 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, 67195 + ... + 111583.

It is an arithmetic number, because the mean of its divisors is an integer number (503382600).

Almost surely, 2^3967888321 is an apocalyptic number.

It is an amenable number.

3967888321 is a deficient number, since it is larger than the sum of its proper divisors (59172479).

3967888321 is a wasteful number, since it uses less digits than its factorization.

3967888321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45719.

The product of its digits is 3483648, while the sum is 55.

The square root of 3967888321 is about 62991.1765329082. The cubic root of 3967888321 is about 1583.1417911328.

The spelling of 3967888321 in words is "three billion, nine hundred sixty-seven million, eight hundred eighty-eight thousand, three hundred twenty-one".