3656817 has 6 divisors (see below), whose sum is σ = 5282082. Its totient is φ = 2437872.

The previous prime is 3656801. The next prime is 3656827. The reversal of 3656817 is 7186563.

It can be written as a sum of positive squares in only one way, i.e., 3594816 + 62001 = 1896^2 + 249^2 .

It is not a de Polignac number, because 3656817 - 2⁴ = 3656801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3656827) 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 5 ways as a sum of consecutive naturals, for example, 203148 + ... + 203165.

It is an arithmetic number, because the mean of its divisors is an integer number (880347).

Almost surely, 2^3656817 is an apocalyptic number.

It is an amenable number.

3656817 is a deficient number, since it is larger than the sum of its proper divisors (1625265).

3656817 is a wasteful number, since it uses less digits than its factorization.

3656817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406319 (or 406316 counting only the distinct ones).

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

The square root of 3656817 is about 1912.2805756478. The cubic root of 3656817 is about 154.0639667925.

It can be divided in two parts, 36568 and 17, that added together give a triangular number (36585 = T₂₇₀).

The spelling of 3656817 in words is "three million, six hundred fifty-six thousand, eight hundred seventeen".