5645440 has 32 divisors (see below), whose sum is σ = 13497660. Its totient is φ = 2257920.

The previous prime is 5645407. The next prime is 5645447. The reversal of 5645440 is 445465.

It can be written as a sum of positive squares in 2 ways, for example, as 5645376 + 64 = 2376^2 + 8^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 5645399 and 5645408.

It is not an unprimeable number, because it can be changed into a prime (5645447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3771 + ... + 5050.

Almost surely, 2^5645440 is an apocalyptic number.

It is an amenable number.

5645440 is an abundant number, since it is smaller than the sum of its proper divisors (7852220).

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

5645440 is an equidigital number, since it uses as much as digits as its factorization.

5645440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8840 (or 8828 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 5645440 is about 2376.0134679753. The cubic root of 5645440 is about 178.0598208228.

The spelling of 5645440 in words is "five million, six hundred forty-five thousand, four hundred forty".