28016045 has 4 divisors (see below), whose sum is σ = 33619260. Its totient is φ = 22412832.

The previous prime is 28016041. The next prime is 28016063. The reversal of 28016045 is 54061082.

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 10156969 + 17859076 = 3187^2 + 4226^2 .

It is a cyclic number.

It is not a de Polignac number, because 28016045 - 2² = 28016041 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28016041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2801600 + ... + 2801609.

It is an arithmetic number, because the mean of its divisors is an integer number (8404815).

Almost surely, 2^28016045 is an apocalyptic number.

It is an amenable number.

28016045 is a deficient number, since it is larger than the sum of its proper divisors (5603215).

28016045 is an equidigital number, since it uses as much as digits as its factorization.

28016045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5603214.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 28016045 is about 5293.0185149875. The cubic root of 28016045 is about 303.7168885763.

The spelling of 28016045 in words is "twenty-eight million, sixteen thousand, forty-five".