28916185 has 8 divisors (see below), whose sum is σ = 35057736. Its totient is φ = 22894080.

The previous prime is 28916183. The next prime is 28916191. The reversal of 28916185 is 58161982.

It can be written as a sum of positive squares in 4 ways, for example, as 6230016 + 22686169 = 2496^2 + 4763^2 .

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

It is not a de Polignac number, because 28916185 - 2¹ = 28916183 is a prime.

It is a super-2 number, since 2×28916185² = 1672291509908450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28916183) 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, 29326 + ... + 30295.

It is an arithmetic number, because the mean of its divisors is an integer number (4382217).

Almost surely, 2^28916185 is an apocalyptic number.

It is an amenable number.

28916185 is a deficient number, since it is larger than the sum of its proper divisors (6141551).

28916185 is an equidigital number, since it uses as much as digits as its factorization.

28916185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59723.

The product of its digits is 34560, while the sum is 40.

The square root of 28916185 is about 5377.3771487594. The cubic root of 28916185 is about 306.9354127835.

The spelling of 28916185 in words is "twenty-eight million, nine hundred sixteen thousand, one hundred eighty-five".