3656986 has 8 divisors (see below), whose sum is σ = 5493600. Its totient is φ = 1825788.

The previous prime is 3656981. The next prime is 3656993. The reversal of 3656986 is 6896563.

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

It is not an unprimeable number, because it can be changed into a prime (3656981) 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 3 ways as a sum of consecutive naturals, for example, 1915 + ... + 3313.

It is an arithmetic number, because the mean of its divisors is an integer number (686700).

Almost surely, 2^3656986 is an apocalyptic number.

3656986 is a deficient number, since it is larger than the sum of its proper divisors (1836614).

3656986 is a wasteful number, since it uses less digits than its factorization.

3656986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2708.

The product of its digits is 233280, while the sum is 43.

The square root of 3656986 is about 1912.3247632136. The cubic root of 3656986 is about 154.0663401141.

The spelling of 3656986 in words is "three million, six hundred fifty-six thousand, nine hundred eighty-six".