5640128 has 28 divisors (see below), whose sum is σ = 12054840. Its totient is φ = 2602752.

The previous prime is 5640119. The next prime is 5640149. The reversal of 5640128 is 8210465.

It is a super-2 number, since 2×5640128² = 63622087712768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 5640097 and 5640106.

It is a congruent number.

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, 2558 + ... + 4221.

It is an arithmetic number, because the mean of its divisors is an integer number (430530).

Almost surely, 2^5640128 is an apocalyptic number.

It is an amenable number.

5640128 is an abundant number, since it is smaller than the sum of its proper divisors (6414712).

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

5640128 is a wasteful number, since it uses less digits than its factorization.

5640128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6804 (or 6794 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 5640128 is about 2374.8953661162. The cubic root of 5640128 is about 178.0039556416.

The spelling of 5640128 in words is "five million, six hundred forty thousand, one hundred twenty-eight".