3667986 has 48 divisors (see below), whose sum is σ = 9307584. Its totient is φ = 1022112.

The previous prime is 3667981. The next prime is 3667987. The reversal of 3667986 is 6897663.

3667986 is a nontrivial binomial coefficient, being equal to C(2709, 2).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3667981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5080 + ... + 5756.

It is an arithmetic number, because the mean of its divisors is an integer number (193908).

Almost surely, 2^3667986 is an apocalyptic number.

3667986 is the 2708-th triangular number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3667986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4653792).

3667986 is an abundant number, since it is smaller than the sum of its proper divisors (5639598).

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

3667986 is a wasteful number, since it uses less digits than its factorization.

3667986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735 (or 732 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 3667986 is about 1915.1986842101. The cubic root of 3667986 is about 154.2206596694.

The spelling of 3667986 in words is "three million, six hundred sixty-seven thousand, nine hundred eighty-six".