3646686 has 16 divisors (see below), whose sum is σ = 7376400. Its totient is φ = 1201728.

The previous prime is 3646681. The next prime is 3646693. The reversal of 3646686 is 6866463.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3646681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2881 + ... + 3948.

It is an arithmetic number, because the mean of its divisors is an integer number (461025).

Almost surely, 2^3646686 is an apocalyptic number.

3646686 is an abundant number, since it is smaller than the sum of its proper divisors (3729714).

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

3646686 is a wasteful number, since it uses less digits than its factorization.

3646686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6923.

The product of its digits is 124416, while the sum is 39.

The square root of 3646686 is about 1909.6298070569. The cubic root of 3646686 is about 153.9215600984.

The spelling of 3646686 in words is "three million, six hundred forty-six thousand, six hundred eighty-six".