3681658 has 4 divisors (see below), whose sum is σ = 5522490. Its totient is φ = 1840828.

The previous prime is 3681619. The next prime is 3681683. The reversal of 3681658 is 8561863.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2866249 + 815409 = 1693^2 + 903^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 920413 + ... + 920416.

Almost surely, 2^3681658 is an apocalyptic number.

3681658 is a deficient number, since it is larger than the sum of its proper divisors (1840832).

3681658 is a wasteful number, since it uses less digits than its factorization.

3681658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840831.

The product of its digits is 34560, while the sum is 37.

The square root of 3681658 is about 1918.7647067840. The cubic root of 3681658 is about 154.4120354028.

The spelling of 3681658 in words is "three million, six hundred eighty-one thousand, six hundred fifty-eight".