3665604 has 24 divisors (see below), whose sum is σ = 8594208. Its totient is φ = 1216000.

The previous prime is 3665587. The next prime is 3665609. The reversal of 3665604 is 4065663.

It is not an unprimeable number, because it can be changed into a prime (3665609) 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, 2404 + ... + 3620.

It is an arithmetic number, because the mean of its divisors is an integer number (358092).

Almost surely, 2^3665604 is an apocalyptic number.

It is an amenable number.

3665604 is an abundant number, since it is smaller than the sum of its proper divisors (4928604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3665604 is a wasteful number, since it uses less digits than its factorization.

3665604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1475 (or 1473 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 3665604 is about 1914.5767156215. The cubic root of 3665604 is about 154.1872686695.

The spelling of 3665604 in words is "three million, six hundred sixty-five thousand, six hundred four".