3648215 has 4 divisors (see below), whose sum is σ = 4377864. Its totient is φ = 2918568.

The previous prime is 3648179. The next prime is 3648241. The reversal of 3648215 is 5128463.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3648215 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364817 + ... + 364826.

It is an arithmetic number, because the mean of its divisors is an integer number (1094466).

Almost surely, 2^3648215 is an apocalyptic number.

3648215 is a deficient number, since it is larger than the sum of its proper divisors (729649).

3648215 is an equidigital number, since it uses as much as digits as its factorization.

3648215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729648.

The product of its digits is 5760, while the sum is 29.

The square root of 3648215 is about 1910.0301044748. The cubic root of 3648215 is about 153.9430694159.

The spelling of 3648215 in words is "three million, six hundred forty-eight thousand, two hundred fifteen".