5440640 has 32 divisors (see below), whose sum is σ = 13008060. Its totient is φ = 2176000.

The previous prime is 5440639. The next prime is 5440657. The reversal of 5440640 is 460445.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4910656 + 529984 = 2216^2 + 728^2 .

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

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, 3611 + ... + 4890.

Almost surely, 2^5440640 is an apocalyptic number.

It is an amenable number.

5440640 is an abundant number, since it is smaller than the sum of its proper divisors (7567420).

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

5440640 is an equidigital number, since it uses as much as digits as its factorization.

5440640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8520 (or 8508 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 5440640 is about 2332.5179527712. The cubic root of 5440640 is about 175.8800836036.

The spelling of 5440640 in words is "five million, four hundred forty thousand, six hundred forty".