3665340 has 72 divisors (see below), whose sum is σ = 12710880. Its totient is φ = 837504.

The previous prime is 3665329. The next prime is 3665357. The reversal of 3665340 is 435663.

3665340 is a `hidden beast` number, since 3 + 6 + 653 + 4 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 195 + ... + 2714.

It is an arithmetic number, because the mean of its divisors is an integer number (176540).

Almost surely, 2^3665340 is an apocalyptic number.

3665340 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3665340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6355440).

3665340 is an abundant number, since it is smaller than the sum of its proper divisors (9045540).

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

3665340 is a wasteful number, since it uses less digits than its factorization.

3665340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2931 (or 2926 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 3665340 is about 1914.5077696369. The cubic root of 3665340 is about 154.1835670134.

It can be divided in two parts, 3665 and 340, that added together give a triangular number (4005 = T₈₉).

The spelling of 3665340 in words is "three million, six hundred sixty-five thousand, three hundred forty".