28385761 has 4 divisors (see below), whose sum is σ = 28396800. Its totient is φ = 28374724.

The previous prime is 28385759. The next prime is 28385783. The reversal of 28385761 is 16758382.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28385761 - 2¹ = 28385759 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28385701) by changing a digit.

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, 600 + ... + 7558.

It is an arithmetic number, because the mean of its divisors is an integer number (7099200).

Almost surely, 2^28385761 is an apocalyptic number.

It is an amenable number.

28385761 is a deficient number, since it is larger than the sum of its proper divisors (11039).

28385761 is an equidigital number, since it uses as much as digits as its factorization.

28385761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11038.

The product of its digits is 80640, while the sum is 40.

The square root of 28385761 is about 5327.8289199260. The cubic root of 28385761 is about 305.0470625218.

The spelling of 28385761 in words is "twenty-eight million, three hundred eighty-five thousand, seven hundred sixty-one".