28511128 has 16 divisors (see below), whose sum is σ = 53730000. Its totient is φ = 14183136.

The previous prime is 28511123. The next prime is 28511167. The reversal of 28511128 is 82111582.

It is a junction number, because it is equal to n+sod(n) for n = 28511096 and 28511105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28511123) 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, 7363 + ... + 10546.

It is an arithmetic number, because the mean of its divisors is an integer number (3358125).

Almost surely, 2^28511128 is an apocalyptic number.

It is an amenable number.

28511128 is a deficient number, since it is larger than the sum of its proper divisors (25218872).

28511128 is a wasteful number, since it uses less digits than its factorization.

28511128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18114 (or 18110 counting only the distinct ones).

The product of its digits is 1280, while the sum is 28.

The square root of 28511128 is about 5339.5812569901. The cubic root of 28511128 is about 305.4954877307.

The spelling of 28511128 in words is "twenty-eight million, five hundred eleven thousand, one hundred twenty-eight".