28811528 has 16 divisors (see below), whose sum is σ = 54092880. Its totient is φ = 14386768.

The previous prime is 28811527. The next prime is 28811533. The reversal of 28811528 is 82511882.

It is not an unprimeable number, because it can be changed into a prime (28811527) by changing a digit.

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, 5675 + ... + 9477.

It is an arithmetic number, because the mean of its divisors is an integer number (3380805).

Almost surely, 2^28811528 is an apocalyptic number.

It is an amenable number.

28811528 is a deficient number, since it is larger than the sum of its proper divisors (25281352).

28811528 is a wasteful number, since it uses less digits than its factorization.

28811528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4756 (or 4752 counting only the distinct ones).

The product of its digits is 10240, while the sum is 35.

The square root of 28811528 is about 5367.6370965258. The cubic root of 28811528 is about 306.5646657200.

The spelling of 28811528 in words is "twenty-eight million, eight hundred eleven thousand, five hundred twenty-eight".