3665940 has 24 divisors (see below), whose sum is σ = 10264800. Its totient is φ = 977568.

The previous prime is 3665939. The next prime is 3665941. The reversal of 3665940 is 495663.

It is a happy number.

3665940 is digitally balanced in base 2 and base 5, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3665939) and next prime (3665941).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3665941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30490 + ... + 30609.

It is an arithmetic number, because the mean of its divisors is an integer number (427700).

Almost surely, 2^3665940 is an apocalyptic number.

3665940 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3665940 is an abundant number, since it is smaller than the sum of its proper divisors (6598860).

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

3665940 is a wasteful number, since it uses less digits than its factorization.

3665940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61111 (or 61109 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 3665940 is about 1914.6644614658. The cubic root of 3665940 is about 154.1919796111.

The spelling of 3665940 in words is "three million, six hundred sixty-five thousand, nine hundred forty".