3665724 has 12 divisors (see below), whose sum is σ = 8553384. Its totient is φ = 1221904.

The previous prime is 3665677. The next prime is 3665731. The reversal of 3665724 is 4275663.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152727 + ... + 152750.

It is an arithmetic number, because the mean of its divisors is an integer number (712782).

Almost surely, 2^3665724 is an apocalyptic number.

It is an amenable number.

3665724 is an abundant number, since it is smaller than the sum of its proper divisors (4887660).

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

3665724 is a wasteful number, since it uses less digits than its factorization.

3665724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305484 (or 305482 counting only the distinct ones).

The product of its digits is 30240, while the sum is 33.

The square root of 3665724 is about 1914.6080538847. The cubic root of 3665724 is about 154.1889511817.

The spelling of 3665724 in words is "three million, six hundred sixty-five thousand, seven hundred twenty-four".