3685860 has 36 divisors (see below), whose sum is σ = 11180988. Its totient is φ = 982848.

The previous prime is 3685849. The next prime is 3685861. The reversal of 3685860 is 685863.

It can be written as a sum of positive squares in 2 ways, for example, as 2143296 + 1542564 = 1464^2 + 1242^2 .

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

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

It is not an unprimeable number, because it can be changed into a prime (3685861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10059 + ... + 10418.

It is an arithmetic number, because the mean of its divisors is an integer number (310583).

Almost surely, 2^3685860 is an apocalyptic number.

3685860 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3685860 is an abundant number, since it is smaller than the sum of its proper divisors (7495128).

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

3685860 is a wasteful number, since it uses less digits than its factorization.

3685860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20492 (or 20487 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 3685860 is about 1919.8593698498. The cubic root of 3685860 is about 154.4707582827.

The spelling of 3685860 in words is "three million, six hundred eighty-five thousand, eight hundred sixty".