3681366 has 32 divisors (see below), whose sum is σ = 8020320. Its totient is φ = 1119744.

The previous prime is 3681341. The next prime is 3681371. The reversal of 3681366 is 6631863.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8286 + ... + 8718.

It is an arithmetic number, because the mean of its divisors is an integer number (250635).

Almost surely, 2^3681366 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3681366, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4010160).

3681366 is an abundant number, since it is smaller than the sum of its proper divisors (4338954).

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

3681366 is a wasteful number, since it uses less digits than its factorization.

3681366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560.

The product of its digits is 15552, while the sum is 33.

The square root of 3681366 is about 1918.6886146532. The cubic root of 3681366 is about 154.4079530477.

Multiplying 3681366 by its sum of digits (33), we get a triangular number (121485078 = T₁₅₅₈₇).

The spelling of 3681366 in words is "three million, six hundred eighty-one thousand, three hundred sixty-six".