6444816 has 40 divisors (see below), whose sum is σ = 19028544. Its totient is φ = 1841280.

The previous prime is 6444803. The next prime is 6444827. The reversal of 6444816 is 6184446.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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, 9255 + ... + 9926.

Almost surely, 2^6444816 is an apocalyptic number.

It is an amenable number.

6444816 is an abundant number, since it is smaller than the sum of its proper divisors (12583728).

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

6444816 is a wasteful number, since it uses less digits than its factorization.

6444816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19199 (or 19193 counting only the distinct ones).

The product of its digits is 18432, while the sum is 33.

The square root of 6444816 is about 2538.6642156851. The cubic root of 6444816 is about 186.0959153818.

It can be divided in two parts, 6444 and 816, that added together give a triangular number (7260 = T₁₂₀).

The spelling of 6444816 in words is "six million, four hundred forty-four thousand, eight hundred sixteen".