3686220 has 36 divisors (see below), whose sum is σ = 11182080. Its totient is φ = 982944.

The previous prime is 3686183. The next prime is 3686237. The reversal of 3686220 is 226863.

3686220 is a `hidden beast` number, since 36 + 8 + 622 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10060 + ... + 10419.

Almost surely, 2^3686220 is an apocalyptic number.

3686220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3686220 is an abundant number, since it is smaller than the sum of its proper divisors (7495860).

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

3686220 is a wasteful number, since it uses less digits than its factorization.

3686220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20494 (or 20489 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 3686220 is about 1919.9531244278. The cubic root of 3686220 is about 154.4757872007.

The spelling of 3686220 in words is "three million, six hundred eighty-six thousand, two hundred twenty".