3681860 has 108 divisors (see below), whose sum is σ = 10289412. Its totient is φ = 1096704.

The previous prime is 3681827. The next prime is 3681871. The reversal of 3681860 is 681863.

It can be written as a sum of positive squares in 6 ways, for example, as 3136 + 3678724 = 56^2 + 1918^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 216572 + ... + 216588.

Almost surely, 2^3681860 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3681860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5144706).

3681860 is an abundant number, since it is smaller than the sum of its proper divisors (6607552).

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

3681860 is a wasteful number, since it uses less digits than its factorization.

3681860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70 (or 44 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 3681860 is about 1918.8173440951. The cubic root of 3681860 is about 154.4148593715.

The spelling of 3681860 in words is "three million, six hundred eighty-one thousand, eight hundred sixty".