6468138 has 24 divisors (see below), whose sum is σ = 14084928. Its totient is φ = 2145192.

The previous prime is 6468089. The next prime is 6468149. The reversal of 6468138 is 8318646.

It is a happy number.

6468138 is a `hidden beast` number, since 646 + 8 + 1 + 3 + 8 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3295 + ... + 4877.

It is an arithmetic number, because the mean of its divisors is an integer number (586872).

Almost surely, 2^6468138 is an apocalyptic number.

6468138 is an abundant number, since it is smaller than the sum of its proper divisors (7616790).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6468138 is a wasteful number, since it uses less digits than its factorization.

6468138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1818 (or 1815 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 6468138 is about 2543.2534281900. The cubic root of 6468138 is about 186.3201216378.

The spelling of 6468138 in words is "six million, four hundred sixty-eight thousand, one hundred thirty-eight".