28690585 has 16 divisors (see below), whose sum is σ = 42924672. Its totient is φ = 17884800.

The previous prime is 28690567. The next prime is 28690609. The reversal of 28690585 is 58509682.

28690585 = 1610² + 1611² + ... + 1620².

It is not a de Polignac number, because 28690585 - 2⁵ = 28690553 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 36876 + ... + 37645.

It is an arithmetic number, because the mean of its divisors is an integer number (2682792).

Almost surely, 2^28690585 is an apocalyptic number.

It is an amenable number.

28690585 is a deficient number, since it is larger than the sum of its proper divisors (14234087).

28690585 is a wasteful number, since it uses less digits than its factorization.

28690585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74544.

The product of its (nonzero) digits is 172800, while the sum is 43.

The square root of 28690585 is about 5356.3593046023. The cubic root of 28690585 is about 306.1351055890.

The spelling of 28690585 in words is "twenty-eight million, six hundred ninety thousand, five hundred eighty-five".