3658689 has 20 divisors (see below), whose sum is σ = 5789124. Its totient is φ = 2294784.

The previous prime is 3658673. The next prime is 3658693. The reversal of 3658689 is 9868563.

It can be written as a sum of positive squares in 2 ways, for example, as 2624400 + 1034289 = 1620^2 + 1017^2 .

It is not a de Polignac number, because 3658689 - 2⁴ = 3658673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3658639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 49 + ... + 2705.

Almost surely, 2^3658689 is an apocalyptic number.

It is an amenable number.

3658689 is a deficient number, since it is larger than the sum of its proper divisors (2130435).

3658689 is a wasteful number, since it uses less digits than its factorization.

3658689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2686 (or 2677 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 3658689 is about 1912.7699809439. The cubic root of 3658689 is about 154.0902518145.

The spelling of 3658689 in words is "three million, six hundred fifty-eight thousand, six hundred eighty-nine".