6387968 has 18 divisors (see below), whose sum is σ = 12751494. Its totient is φ = 3193856.

The previous prime is 6387961. The next prime is 6387977. The reversal of 6387968 is 8697836.

It can be written as a sum of positive squares in only one way, i.e., 5914624 + 473344 = 2432^2 + 688^2 .

It is a super-2 number, since 2×6387968² = 81612270338048, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6387961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12221 + ... + 12732.

Almost surely, 2^6387968 is an apocalyptic number.

It is an amenable number.

6387968 is a deficient number, since it is larger than the sum of its proper divisors (6363526).

6387968 is an equidigital number, since it uses as much as digits as its factorization.

6387968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24969 (or 24955 counting only the distinct ones).

The product of its digits is 435456, while the sum is 47.

The square root of 6387968 is about 2527.4429766070. The cubic root of 6387968 is about 185.5471311960.

The spelling of 6387968 in words is "six million, three hundred eighty-seven thousand, nine hundred sixty-eight".