28512501 has 8 divisors (see below), whose sum is σ = 38041344. Its totient is φ = 18996000.

The previous prime is 28512487. The next prime is 28512511. The reversal of 28512501 is 10521582.

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

It is not a de Polignac number, because 28512501 - 2¹⁰ = 28511477 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28512511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7420 + ... + 10586.

It is an arithmetic number, because the mean of its divisors is an integer number (4755168).

Almost surely, 2^28512501 is an apocalyptic number.

It is an amenable number.

28512501 is a deficient number, since it is larger than the sum of its proper divisors (9528843).

28512501 is a wasteful number, since it uses less digits than its factorization.

28512501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6171.

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 28512501 is about 5339.7098235766. The cubic root of 28512501 is about 305.5003915303.

The spelling of 28512501 in words is "twenty-eight million, five hundred twelve thousand, five hundred one".