3681445 has 8 divisors (see below), whose sum is σ = 4520736. Its totient is φ = 2876496.

The previous prime is 3681443. The next prime is 3681451. The reversal of 3681445 is 5441863.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3681445 - 2¹ = 3681443 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3681443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8347 + ... + 8776.

It is an arithmetic number, because the mean of its divisors is an integer number (565092).

Almost surely, 2^3681445 is an apocalyptic number.

It is an amenable number.

3681445 is a deficient number, since it is larger than the sum of its proper divisors (839291).

3681445 is a wasteful number, since it uses less digits than its factorization.

3681445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17171.

The product of its digits is 11520, while the sum is 31.

The square root of 3681445 is about 1918.7092015206. The cubic root of 3681445 is about 154.4090575418.

The spelling of 3681445 in words is "three million, six hundred eighty-one thousand, four hundred forty-five".