3665439 has 8 divisors (see below), whose sum is σ = 5430320. Its totient is φ = 2443608.

The previous prime is 3665437. The next prime is 3665443. The reversal of 3665439 is 9345663.

It is not a de Polignac number, because 3665439 - 2¹ = 3665437 is a prime.

It is a Duffinian number.

3665439 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3665437) 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, 67852 + ... + 67905.

It is an arithmetic number, because the mean of its divisors is an integer number (678790).

Almost surely, 2^3665439 is an apocalyptic number.

3665439 is a deficient number, since it is larger than the sum of its proper divisors (1764881).

3665439 is a wasteful number, since it uses less digits than its factorization.

3665439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135766 (or 135760 counting only the distinct ones).

The product of its digits is 58320, while the sum is 36.

The square root of 3665439 is about 1914.5336246721. The cubic root of 3665439 is about 154.1849551553.

The spelling of 3665439 in words is "three million, six hundred sixty-five thousand, four hundred thirty-nine".