3686985 has 32 divisors (see below), whose sum is σ = 6773760. Its totient is φ = 1900800.

The previous prime is 3686983. The next prime is 3686987. The reversal of 3686985 is 5896863.

It is an interprime number because it is at equal distance from previous prime (3686983) and next prime (3686987).

It is not a de Polignac number, because 3686985 - 2¹ = 3686983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a d-powerful number, because it can be written as 3 + 6⁶ + 8³ + 6⁸ + 9⁴ + 8³ + 5⁹ .

It is a self number, because there is not a number n which added to its sum of digits gives 3686985.

It is not an unprimeable number, because it can be changed into a prime (3686983) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3745 + ... + 4625.

It is an arithmetic number, because the mean of its divisors is an integer number (211680).

Almost surely, 2^3686985 is an apocalyptic number.

It is an amenable number.

3686985 is a deficient number, since it is larger than the sum of its proper divisors (3086775).

3686985 is a wasteful number, since it uses less digits than its factorization.

3686985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926 (or 920 counting only the distinct ones).

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

The square root of 3686985 is about 1920.1523377066. The cubic root of 3686985 is about 154.4864725643.

The spelling of 3686985 in words is "three million, six hundred eighty-six thousand, nine hundred eighty-five".