3646409 has 8 divisors (see below), whose sum is σ = 3951360. Its totient is φ = 3344976.

The previous prime is 3646399. The next prime is 3646411. The reversal of 3646409 is 9046463.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3646409 - 2⁴ = 3646393 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3646009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1544 + ... + 3110.

It is an arithmetic number, because the mean of its divisors is an integer number (493920).

Almost surely, 2^3646409 is an apocalyptic number.

It is an amenable number.

3646409 is a deficient number, since it is larger than the sum of its proper divisors (304951).

3646409 is a wasteful number, since it uses less digits than its factorization.

3646409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1759.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 3646409 is about 1909.5572785334. The cubic root of 3646409 is about 153.9176627377.

The spelling of 3646409 in words is "three million, six hundred forty-six thousand, four hundred nine".