6538816 has 28 divisors (see below), whose sum is σ = 13167360. Its totient is φ = 3221120.

The previous prime is 6538813. The next prime is 6538817. The reversal of 6538816 is 6188356.

It is a super-2 number, since 2×6538816² = 85512229363712, which contains 22 as substring.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (6538813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3825 + ... + 5263.

Almost surely, 2^6538816 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 6538816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6583680).

6538816 is an abundant number, since it is smaller than the sum of its proper divisors (6628544).

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

6538816 is a wasteful number, since it uses less digits than its factorization.

6538816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522 (or 1512 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 6538816 is about 2557.1108697121. The cubic root of 6538816 is about 186.9963109456.

The spelling of 6538816 in words is "six million, five hundred thirty-eight thousand, eight hundred sixteen".