3691816 has 16 divisors (see below), whose sum is σ = 7161300. Its totient is φ = 1782144.

The previous prime is 3691813. The next prime is 3691819. The reversal of 3691816 is 6181963.

It is an interprime number because it is at equal distance from previous prime (3691813) and next prime (3691819).

It can be written as a sum of positive squares in 2 ways, for example, as 3572100 + 119716 = 1890^2 + 346^2 .

It is not an unprimeable number, because it can be changed into a prime (3691811) 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, 7725 + ... + 8188.

Almost surely, 2^3691816 is an apocalyptic number.

It is an amenable number.

3691816 is a deficient number, since it is larger than the sum of its proper divisors (3469484).

3691816 is a wasteful number, since it uses less digits than its factorization.

3691816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15948 (or 15944 counting only the distinct ones).

The product of its digits is 7776, while the sum is 34.

The square root of 3691816 is about 1921.4098990065. The cubic root of 3691816 is about 154.5539168691.

The spelling of 3691816 in words is "three million, six hundred ninety-one thousand, eight hundred sixteen".