6216444 has 72 divisors (see below), whose sum is σ = 17428320. Its totient is φ = 1855872.

The previous prime is 6216437. The next prime is 6216479. The reversal of 6216444 is 4446126.

6216444 is a `hidden beast` number, since 6 + 216 + 444 = 666.

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 23 ways as a sum of consecutive naturals, for example, 17137 + ... + 17495.

It is an arithmetic number, because the mean of its divisors is an integer number (242060).

Almost surely, 2^6216444 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 6216444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8714160).

6216444 is an abundant number, since it is smaller than the sum of its proper divisors (11211876).

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

6216444 is a wasteful number, since it uses less digits than its factorization.

6216444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419 (or 414 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 6216444 is about 2493.2797676956. The cubic root of 6216444 is about 183.8713262317.

The spelling of 6216444 in words is "six million, two hundred sixteen thousand, four hundred forty-four".