6439908 has 24 divisors (see below), whose sum is σ = 15680448. Its totient is φ = 2053216.

The previous prime is 6439903. The next prime is 6439919. The reversal of 6439908 is 8099346.

It is not an unprimeable number, because it can be changed into a prime (6439903) 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, 11391 + ... + 11942.

It is an arithmetic number, because the mean of its divisors is an integer number (653352).

Almost surely, 2^6439908 is an apocalyptic number.

It is an amenable number.

6439908 is an abundant number, since it is smaller than the sum of its proper divisors (9240540).

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

6439908 is a wasteful number, since it uses less digits than its factorization.

6439908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23363 (or 23361 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 6439908 is about 2537.6973814858. The cubic root of 6439908 is about 186.0486634146.

The spelling of 6439908 in words is "six million, four hundred thirty-nine thousand, nine hundred eight".