6440268 has 24 divisors (see below), whose sum is σ = 15240960. Its totient is φ = 2116240.

The previous prime is 6440249. The next prime is 6440303. The reversal of 6440268 is 8620446.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2928 + ... + 4631.

It is an arithmetic number, because the mean of its divisors is an integer number (635040).

Almost surely, 2^6440268 is an apocalyptic number.

It is an amenable number.

6440268 is an abundant number, since it is smaller than the sum of its proper divisors (8800692).

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

6440268 is a wasteful number, since it uses less digits than its factorization.

6440268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7637 (or 7635 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 6440268 is about 2537.7683109378. The cubic root of 6440268 is about 186.0521301448.

The spelling of 6440268 in words is "six million, four hundred forty thousand, two hundred sixty-eight".