3665808 has 30 divisors (see below), whose sum is σ = 10259574. Its totient is φ = 1221888.

The previous prime is 3665807. The next prime is 3665813. The reversal of 3665808 is 8085663.

It can be written as a sum of positive squares in only one way, i.e., 2108304 + 1557504 = 1452^2 + 1248^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (3665807) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12585 + ... + 12872.

Almost surely, 2^3665808 is an apocalyptic number.

It is an amenable number.

3665808 is an abundant number, since it is smaller than the sum of its proper divisors (6593766).

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

3665808 is a wasteful number, since it uses less digits than its factorization.

3665808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25471 (or 25462 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 3665808 is about 1914.6299903637. The cubic root of 3665808 is about 154.1901289184.

The spelling of 3665808 in words is "three million, six hundred sixty-five thousand, eight hundred eight".