20191128 has 16 divisors (see below), whose sum is σ = 50477880. Its totient is φ = 6730368.

The previous prime is 20191117. The next prime is 20191133. The reversal of 20191128 is 82119102.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 841297 = 20191128 / (2 + 0 + 1 + 9 + 1 + 1 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 20191098 and 20191107.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 420625 + ... + 420672.

Almost surely, 2^20191128 is an apocalyptic number.

It is an amenable number.

20191128 is an abundant number, since it is smaller than the sum of its proper divisors (30286752).

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

20191128 is a wasteful number, since it uses less digits than its factorization.

20191128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841306 (or 841302 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 20191128 is about 4493.4539054051. The cubic root of 20191128 is about 272.3036905007.

The spelling of 20191128 in words is "twenty million, one hundred ninety-one thousand, one hundred twenty-eight".