6378444 has 36 divisors (see below), whose sum is σ = 16432416. Its totient is φ = 2085408.

The previous prime is 6378409. The next prime is 6378487. The reversal of 6378444 is 4448736.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×6378444² = 81369095722272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 6378399 and 6378408.

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 11 ways as a sum of consecutive naturals, for example, 237 + ... + 3579.

It is an arithmetic number, because the mean of its divisors is an integer number (456456).

Almost surely, 2^6378444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6378444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8216208).

6378444 is an abundant number, since it is smaller than the sum of its proper divisors (10053972).

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

6378444 is a wasteful number, since it uses less digits than its factorization.

6378444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3406 (or 3401 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 6378444 is about 2525.5581561310. The cubic root of 6378444 is about 185.4548728630.

The spelling of 6378444 in words is "six million, three hundred seventy-eight thousand, four hundred forty-four".