28605945 has 8 divisors (see below), whose sum is σ = 45769536. Its totient is φ = 15256496.

The previous prime is 28605943. The next prime is 28605949. The reversal of 28605945 is 54950682.

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

It is a cyclic number.

It is not a de Polignac number, because 28605945 - 2¹ = 28605943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28605943) 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 7 ways as a sum of consecutive naturals, for example, 953517 + ... + 953546.

It is an arithmetic number, because the mean of its divisors is an integer number (5721192).

Almost surely, 2^28605945 is an apocalyptic number.

It is an amenable number.

28605945 is a deficient number, since it is larger than the sum of its proper divisors (17163591).

28605945 is a wasteful number, since it uses less digits than its factorization.

28605945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1907071.

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 28605945 is about 5348.4525799524. The cubic root of 28605945 is about 305.8337663467.

The spelling of 28605945 in words is "twenty-eight million, six hundred five thousand, nine hundred forty-five".