5665940 has 24 divisors (see below), whose sum is σ = 13598592. Its totient is φ = 1942560.

The previous prime is 5665937. The next prime is 5665949. The reversal of 5665940 is 495665.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 5665940.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5665949) 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, 20096 + ... + 20375.

It is an arithmetic number, because the mean of its divisors is an integer number (566608).

Almost surely, 2^5665940 is an apocalyptic number.

It is an amenable number.

5665940 is an abundant number, since it is smaller than the sum of its proper divisors (7932652).

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

5665940 is a wasteful number, since it uses less digits than its factorization.

5665940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40487 (or 40485 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 5665940 is about 2380.3235074250. The cubic root of 5665940 is about 178.2750870037.

The spelling of 5665940 in words is "five million, six hundred sixty-five thousand, nine hundred forty".