3691216 has 20 divisors (see below), whose sum is σ = 7185924. Its totient is φ = 1836800.

The previous prime is 3691213. The next prime is 3691223. The reversal of 3691216 is 6121963.

It can be written as a sum of positive squares in 2 ways, for example, as 1742400 + 1948816 = 1320^2 + 1396^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3691213) 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, 4086 + ... + 4906.

Almost surely, 2^3691216 is an apocalyptic number.

It is an amenable number.

3691216 is a deficient number, since it is larger than the sum of its proper divisors (3494708).

3691216 is a wasteful number, since it uses less digits than its factorization.

3691216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110 (or 1104 counting only the distinct ones).

The product of its digits is 1944, while the sum is 28.

The square root of 3691216 is about 1921.2537573158. The cubic root of 3691216 is about 154.5455436300.

The spelling of 3691216 in words is "three million, six hundred ninety-one thousand, two hundred sixteen".