28160045 has 8 divisors (see below), whose sum is σ = 34172280. Its totient is φ = 22274560.

The previous prime is 28160029. The next prime is 28160047. The reversal of 28160045 is 54006182.

It can be written as a sum of positive squares in 4 ways, for example, as 48841 + 28111204 = 221^2 + 5302^2 .

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

It is not a de Polignac number, because 28160045 - 2⁴ = 28160029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28159996 and 28160023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28160047) 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, 31196 + ... + 32085.

It is an arithmetic number, because the mean of its divisors is an integer number (4271535).

Almost surely, 2^28160045 is an apocalyptic number.

It is an amenable number.

28160045 is a deficient number, since it is larger than the sum of its proper divisors (6012235).

28160045 is an equidigital number, since it uses as much as digits as its factorization.

28160045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63375.

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

The square root of 28160045 is about 5306.6039045702. The cubic root of 28160045 is about 304.2363589185.

The spelling of 28160045 in words is "twenty-eight million, one hundred sixty thousand, forty-five".