28747165 has 8 divisors (see below), whose sum is σ = 35062488. Its totient is φ = 22620480.

The previous prime is 28747163. The next prime is 28747189. The reversal of 28747165 is 56174782.

It can be written as a sum of positive squares in 4 ways, for example, as 4481689 + 24265476 = 2117^2 + 4926^2 .

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

It is not a de Polignac number, because 28747165 - 2¹ = 28747163 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28747163) 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, 46822 + ... + 47431.

It is an arithmetic number, because the mean of its divisors is an integer number (4382811).

Almost surely, 2^28747165 is an apocalyptic number.

It is an amenable number.

28747165 is a deficient number, since it is larger than the sum of its proper divisors (6315323).

28747165 is an equidigital number, since it uses as much as digits as its factorization.

28747165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94319.

The product of its digits is 94080, while the sum is 40.

The square root of 28747165 is about 5361.6382757512. The cubic root of 28747165 is about 306.3362139613.

The spelling of 28747165 in words is "twenty-eight million, seven hundred forty-seven thousand, one hundred sixty-five".