3660385 has 4 divisors (see below), whose sum is σ = 4392468. Its totient is φ = 2928304.

The previous prime is 3660379. The next prime is 3660401. The reversal of 3660385 is 5830663.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5830663 = 19 ⋅306877.

It can be written as a sum of positive squares in 2 ways, for example, as 1151329 + 2509056 = 1073^2 + 1584^2 .

It is a cyclic number.

It is not a de Polignac number, because 3660385 - 2⁵ = 3660353 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 366034 + ... + 366043.

It is an arithmetic number, because the mean of its divisors is an integer number (1098117).

Almost surely, 2^3660385 is an apocalyptic number.

It is an amenable number.

3660385 is a deficient number, since it is larger than the sum of its proper divisors (732083).

3660385 is an equidigital number, since it uses as much as digits as its factorization.

3660385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732082.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 3660385 is about 1913.2132656868. The cubic root of 3660385 is about 154.1140578550.

The spelling of 3660385 in words is "three million, six hundred sixty thousand, three hundred eighty-five".