5631128 has 16 divisors (see below), whose sum is σ = 10585080. Its totient is φ = 2808448.

The previous prime is 5631121. The next prime is 5631169. The reversal of 5631128 is 8211365.

It is a Cunningham number, because it is equal to 2373²-1.

It is a junction number, because it is equal to n+sod(n) for n = 5631097 and 5631106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5631121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4151 + ... + 5337.

Almost surely, 2^5631128 is an apocalyptic number.

It is an amenable number.

5631128 is a deficient number, since it is larger than the sum of its proper divisors (4953952).

5631128 is a wasteful number, since it uses less digits than its factorization.

5631128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1786 (or 1782 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 5631128 is about 2372.9997892962. Note that the first 3 decimals coincide. The cubic root of 5631128 is about 177.9092244296.

The spelling of 5631128 in words is "five million, six hundred thirty-one thousand, one hundred twenty-eight".