28538485 has 8 divisors (see below), whose sum is σ = 34306776. Its totient is φ = 22790400.

The previous prime is 28538483. The next prime is 28538491. The reversal of 28538485 is 58483582.

It can be written as a sum of positive squares in 4 ways, for example, as 1425636 + 27112849 = 1194^2 + 5207^2 .

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

It is not a de Polignac number, because 28538485 - 2¹ = 28538483 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28538483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1744 + ... + 7753.

It is an arithmetic number, because the mean of its divisors is an integer number (4288347).

Almost surely, 2^28538485 is an apocalyptic number.

It is an amenable number.

28538485 is a deficient number, since it is larger than the sum of its proper divisors (5768291).

28538485 is an equidigital number, since it uses as much as digits as its factorization.

28538485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10103.

The product of its digits is 307200, while the sum is 43.

The square root of 28538485 is about 5342.1423605142. The cubic root of 28538485 is about 305.5931661815.

The spelling of 28538485 in words is "twenty-eight million, five hundred thirty-eight thousand, four hundred eighty-five".