3665896 has 32 divisors (see below), whose sum is σ = 7497000. Its totient is φ = 1670400.

The previous prime is 3665881. The next prime is 3665899. The reversal of 3665896 is 6985663.

It can be written as a sum of positive squares in 4 ways, for example, as 3556996 + 108900 = 1886^2 + 330^2 .

It is not an unprimeable number, because it can be changed into a prime (3665899) 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, 10330 + ... + 10678.

Almost surely, 2^3665896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3665896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3748500).

3665896 is an abundant number, since it is smaller than the sum of its proper divisors (3831104).

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

3665896 is a wasteful number, since it uses less digits than its factorization.

3665896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469 (or 465 counting only the distinct ones).

The product of its digits is 233280, while the sum is 43.

The square root of 3665896 is about 1914.6529711674. The cubic root of 3665896 is about 154.1913627185.

The spelling of 3665896 in words is "three million, six hundred sixty-five thousand, eight hundred ninety-six".