3681657 has 12 divisors (see below), whose sum is σ = 6077760. Its totient is φ = 2103768.

The previous prime is 3681619. The next prime is 3681683. The reversal of 3681657 is 7561863.

It is not a de Polignac number, because 3681657 - 2⁶ = 3681593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3681697) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29157 + ... + 29282.

It is an arithmetic number, because the mean of its divisors is an integer number (506480).

Almost surely, 2^3681657 is an apocalyptic number.

It is an amenable number.

3681657 is a deficient number, since it is larger than the sum of its proper divisors (2396103).

3681657 is a wasteful number, since it uses less digits than its factorization.

3681657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58452 (or 58449 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 3681657 is about 1918.7644461997. The cubic root of 3681657 is about 154.4120214225.

It can be divided in two parts, 368 and 1657, that added together give a square (2025 = 45²).

The spelling of 3681657 in words is "three million, six hundred eighty-one thousand, six hundred fifty-seven".