5640940 has 48 divisors (see below), whose sum is σ = 12845952. Its totient is φ = 2072576.

The previous prime is 5640919. The next prime is 5640953. The reversal of 5640940 is 490465.

It is a junction number, because it is equal to n+sod(n) for n = 5640899 and 5640908.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 15804 + ... + 16156.

It is an arithmetic number, because the mean of its divisors is an integer number (267624).

Almost surely, 2^5640940 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5640940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6422976).

5640940 is an abundant number, since it is smaller than the sum of its proper divisors (7205012).

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

5640940 is a wasteful number, since it uses less digits than its factorization.

5640940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426 (or 424 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 5640940 is about 2375.0663148637. The cubic root of 5640940 is about 178.0124975444.

The spelling of 5640940 in words is "five million, six hundred forty thousand, nine hundred forty".