3777216 has 56 divisors (see below), whose sum is σ = 10143744. Its totient is φ = 1240320.

The previous prime is 3777211. The next prime is 3777217. The reversal of 3777216 is 6127773.

It is not an unprimeable number, because it can be changed into a prime (3777211) 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, 19681 + ... + 19871.

Almost surely, 2^3777216 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 3777216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5071872).

3777216 is an abundant number, since it is smaller than the sum of its proper divisors (6366528).

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

3777216 is a wasteful number, since it uses less digits than its factorization.

3777216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309 (or 299 counting only the distinct ones).

The product of its digits is 12348, while the sum is 33.

The square root of 3777216 is about 1943.5061101010. The cubic root of 3777216 is about 155.7365705317.

It can be divided in two parts, 3777 and 216, that added together give a palindrome (3993).

The spelling of 3777216 in words is "three million, seven hundred seventy-seven thousand, two hundred sixteen".