3686616 has 24 divisors (see below), whose sum is σ = 9984780. Its totient is φ = 1228848.

The previous prime is 3686609. The next prime is 3686621. The reversal of 3686616 is 6166863.

3686616 is a `hidden beast` number, since 36 + 8 + 6 + 616 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×3686616² = 27182275062912, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25530 + ... + 25673.

Almost surely, 2^3686616 is an apocalyptic number.

3686616 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3686616 is an abundant number, since it is smaller than the sum of its proper divisors (6298164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3686616 is a wasteful number, since it uses less digits than its factorization.

3686616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51215 (or 51208 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 3686616 is about 1920.0562491760. The cubic root of 3686616 is about 154.4813186323.

The spelling of 3686616 in words is "three million, six hundred eighty-six thousand, six hundred sixteen".