6449868 has 60 divisors (see below), whose sum is σ = 17868312. Its totient is φ = 2021760.

The previous prime is 6449837. The next prime is 6449881. The reversal of 6449868 is 8689446.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4923 + ... + 6093.

Almost surely, 2^6449868 is an apocalyptic number.

6449868 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6449868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8934156).

6449868 is an abundant number, since it is smaller than the sum of its proper divisors (11418444).

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

6449868 is a wasteful number, since it uses less digits than its factorization.

6449868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204 (or 1193 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 6449868 is about 2539.6590322325. The cubic root of 6449868 is about 186.1445286659.

The spelling of 6449868 in words is "six million, four hundred forty-nine thousand, eight hundred sixty-eight".