3686481 has 6 divisors (see below), whose sum is σ = 5324930. Its totient is φ = 2457648.

The previous prime is 3686479. The next prime is 3686483. The reversal of 3686481 is 1846863.

It is a happy number.

3686481 is a `hidden beast` number, since 3 + 6 + 8 + 648 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (3686479) and next prime (3686483).

It can be written as a sum of positive squares in only one way, i.e., 3686400 + 81 = 1920^2 + 9^2 .

It is not a de Polignac number, because 3686481 - 2¹ = 3686479 is a prime.

It is a super-2 number, since 2×3686481² = 27180284326722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3686483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 204796 + ... + 204813.

Almost surely, 2^3686481 is an apocalyptic number.

It is an amenable number.

3686481 is a deficient number, since it is larger than the sum of its proper divisors (1638449).

3686481 is a wasteful number, since it uses less digits than its factorization.

3686481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409615 (or 409612 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 3686481 is about 1920.0210936341. The cubic root of 3686481 is about 154.4794329615.

It can be divided in two parts, 36864 and 81, that multiplied together give a 6-th power (2985984 = 12⁶).

The spelling of 3686481 in words is "three million, six hundred eighty-six thousand, four hundred eighty-one".