28385485 has 4 divisors (see below), whose sum is σ = 34062588. Its totient is φ = 22708384.

The previous prime is 28385479. The next prime is 28385501. The reversal of 28385485 is 58458382.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6651241 + 21734244 = 2579^2 + 4662^2 .

It is a cyclic number.

It is not a de Polignac number, because 28385485 - 2³ = 28385477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 2838544 + ... + 2838553.

It is an arithmetic number, because the mean of its divisors is an integer number (8515647).

Almost surely, 2^28385485 is an apocalyptic number.

It is an amenable number.

28385485 is a deficient number, since it is larger than the sum of its proper divisors (5677103).

28385485 is an equidigital number, since it uses as much as digits as its factorization.

28385485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5677102.

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

The square root of 28385485 is about 5327.8030181305. The cubic root of 28385485 is about 305.0460738423.

The spelling of 28385485 in words is "twenty-eight million, three hundred eighty-five thousand, four hundred eighty-five".