3668391 has 6 divisors (see below), whose sum is σ = 5298800. Its totient is φ = 2445588.

The previous prime is 3668389. The next prime is 3668407. The reversal of 3668391 is 1938663.

It is a happy number.

It is not a de Polignac number, because 3668391 - 2¹ = 3668389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3668381) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 203791 + ... + 203808.

Almost surely, 2^3668391 is an apocalyptic number.

3668391 is a deficient number, since it is larger than the sum of its proper divisors (1630409).

3668391 is a wasteful number, since it uses less digits than its factorization.

3668391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407605 (or 407602 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 3668391 is about 1915.3044144470. The cubic root of 3668391 is about 154.2263355424.

The spelling of 3668391 in words is "three million, six hundred sixty-eight thousand, three hundred ninety-one".