3722216 has 8 divisors (see below), whose sum is σ = 6979170. Its totient is φ = 1861104.

The previous prime is 3722207. The next prime is 3722219. The reversal of 3722216 is 6122273.

It can be written as a sum of positive squares in only one way, i.e., 2992900 + 729316 = 1730^2 + 854^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 3722191 and 3722200.

It is not an unprimeable number, because it can be changed into a prime (3722219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 232631 + ... + 232646.

Almost surely, 2^3722216 is an apocalyptic number.

It is an amenable number.

3722216 is a deficient number, since it is larger than the sum of its proper divisors (3256954).

3722216 is a wasteful number, since it uses less digits than its factorization.

3722216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465283 (or 465279 counting only the distinct ones).

The product of its digits is 1008, while the sum is 23.

The square root of 3722216 is about 1929.3045379100. The cubic root of 3722216 is about 154.9769788911.

Adding to 3722216 its reverse (6122273), we get a palindrome (9844489).

The spelling of 3722216 in words is "three million, seven hundred twenty-two thousand, two hundred sixteen".