3565216 has 24 divisors (see below), whose sum is σ = 7185024. Its totient is φ = 1740480.

The previous prime is 3565213. The next prime is 3565241. The reversal of 3565216 is 6125653.

It is not an unprimeable number, because it can be changed into a prime (3565213) 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, 81 + ... + 2671.

It is an arithmetic number, because the mean of its divisors is an integer number (299376).

Almost surely, 2^3565216 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 3565216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3592512).

3565216 is an abundant number, since it is smaller than the sum of its proper divisors (3619808).

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

3565216 is a wasteful number, since it uses less digits than its factorization.

3565216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2644 (or 2636 counting only the distinct ones).

The product of its digits is 5400, while the sum is 28.

The square root of 3565216 is about 1888.1779577148. The cubic root of 3565216 is about 152.7666712759.

The spelling of 3565216 in words is "three million, five hundred sixty-five thousand, two hundred sixteen".