28475565 has 8 divisors (see below), whose sum is σ = 45560928. Its totient is φ = 15186960.

The previous prime is 28475563. The next prime is 28475569. The reversal of 28475565 is 56557482.

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

It is not a de Polignac number, because 28475565 - 2¹ = 28475563 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 (28475563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 949171 + ... + 949200.

It is an arithmetic number, because the mean of its divisors is an integer number (5695116).

Almost surely, 2^28475565 is an apocalyptic number.

It is an amenable number.

28475565 is a deficient number, since it is larger than the sum of its proper divisors (17085363).

28475565 is a wasteful number, since it uses less digits than its factorization.

28475565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1898379.

The product of its digits is 336000, while the sum is 42.

The square root of 28475565 is about 5336.2500878426. The cubic root of 28475565 is about 305.3684162199.

The spelling of 28475565 in words is "twenty-eight million, four hundred seventy-five thousand, five hundred sixty-five".