28512535 has 8 divisors (see below), whose sum is σ = 34697376. Its totient is φ = 22488480.

The previous prime is 28512511. The next prime is 28512541. The reversal of 28512535 is 53521582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28512535 - 2⁹ = 28512023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28512497 and 28512506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39804 + ... + 40513.

It is an arithmetic number, because the mean of its divisors is an integer number (4337172).

Almost surely, 2^28512535 is an apocalyptic number.

28512535 is a deficient number, since it is larger than the sum of its proper divisors (6184841).

28512535 is an equidigital number, since it uses as much as digits as its factorization.

28512535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80393.

The product of its digits is 12000, while the sum is 31.

The square root of 28512535 is about 5339.7130072692. The cubic root of 28512535 is about 305.5005129625.

The spelling of 28512535 in words is "twenty-eight million, five hundred twelve thousand, five hundred thirty-five".