3646447 has 4 divisors (see below), whose sum is σ = 4167376. Its totient is φ = 3125520.

The previous prime is 3646441. The next prime is 3646463. The reversal of 3646447 is 7446463.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3646447 - 2⁷ = 3646319 is a prime.

It is a Duffinian number.

3646447 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3646441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260454 + ... + 260467.

It is an arithmetic number, because the mean of its divisors is an integer number (1041844).

Almost surely, 2^3646447 is an apocalyptic number.

3646447 is a deficient number, since it is larger than the sum of its proper divisors (520929).

3646447 is an equidigital number, since it uses as much as digits as its factorization.

3646447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520928.

The product of its digits is 48384, while the sum is 34.

The square root of 3646447 is about 1909.5672284578. The cubic root of 3646447 is about 153.9181974054.

The spelling of 3646447 in words is "three million, six hundred forty-six thousand, four hundred forty-seven".