28988523 has 10 divisors (see below), whose sum is σ = 43303964. Its totient is φ = 19325628.

The previous prime is 28988521. The next prime is 28988551. The reversal of 28988523 is 32588982.

It is not a de Polignac number, because 28988523 - 2¹ = 28988521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28988521) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 178861 + ... + 179022.

Almost surely, 2^28988523 is an apocalyptic number.

28988523 is a deficient number, since it is larger than the sum of its proper divisors (14315441).

28988523 is an equidigital number, since it uses as much as digits as its factorization.

28988523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357895 (or 357886 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 28988523 is about 5384.0990889842. The cubic root of 28988523 is about 307.1911473584.

The spelling of 28988523 in words is "twenty-eight million, nine hundred eighty-eight thousand, five hundred twenty-three".