6443916 has 24 divisors (see below), whose sum is σ = 15555120. Its totient is φ = 2073792.

The previous prime is 6443911. The next prime is 6443917. The reversal of 6443916 is 6193446.

It is not an unprimeable number, because it can be changed into a prime (6443911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8911 + ... + 9606.

It is an arithmetic number, because the mean of its divisors is an integer number (648130).

Almost surely, 2^6443916 is an apocalyptic number.

It is an amenable number.

6443916 is an abundant number, since it is smaller than the sum of its proper divisors (9111204).

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

6443916 is a wasteful number, since it uses less digits than its factorization.

6443916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18553 (or 18551 counting only the distinct ones).

The product of its digits is 15552, while the sum is 33.

The square root of 6443916 is about 2538.4869509217. The cubic root of 6443916 is about 186.0872523923.

It can be divided in two parts, 644 and 3916, that added together give a triangular number (4560 = T₉₅).

The spelling of 6443916 in words is "six million, four hundred forty-three thousand, nine hundred sixteen".