28402585 has 8 divisors (see below), whose sum is σ = 35565120. Its totient is φ = 21734064.

The previous prime is 28402579. The next prime is 28402589. The reversal of 28402585 is 58520482.

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 28402585 - 2¹⁹ = 27878297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28402585.

It is not an unprimeable number, because it can be changed into a prime (28402589) 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, 123375 + ... + 123604.

It is an arithmetic number, because the mean of its divisors is an integer number (4445640).

Almost surely, 2^28402585 is an apocalyptic number.

It is an amenable number.

28402585 is a deficient number, since it is larger than the sum of its proper divisors (7162535).

28402585 is a wasteful number, since it uses less digits than its factorization.

28402585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247007.

The product of its (nonzero) digits is 25600, while the sum is 34.

The square root of 28402585 is about 5329.4075655742. The cubic root of 28402585 is about 305.1073168890.

The spelling of 28402585 in words is "twenty-eight million, four hundred two thousand, five hundred eighty-five".