3665216 has 14 divisors (see below), whose sum is σ = 7273290. Its totient is φ = 1832576.

The previous prime is 3665203. The next prime is 3665227. The reversal of 3665216 is 6125663.

It can be written as a sum of positive squares in only one way, i.e., 3625216 + 40000 = 1904^2 + 200^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28571 + ... + 28698.

Almost surely, 2^3665216 is an apocalyptic number.

It is an amenable number.

3665216 is a deficient number, since it is larger than the sum of its proper divisors (3608074).

3665216 is an equidigital number, since it uses as much as digits as its factorization.

3665216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57281 (or 57271 counting only the distinct ones).

The product of its digits is 6480, while the sum is 29.

The square root of 3665216 is about 1914.4753850598. The cubic root of 3665216 is about 154.1818282954.

The spelling of 3665216 in words is "three million, six hundred sixty-five thousand, two hundred sixteen".