28585859 has 4 divisors (see below), whose sum is σ = 28600104. Its totient is φ = 28571616.

The previous prime is 28585831. The next prime is 28585871. The reversal of 28585859 is 95858582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95858582 = 2 ⋅47929291.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28585859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28585819) 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 3 ways as a sum of consecutive naturals, for example, 3497 + ... + 8330.

It is an arithmetic number, because the mean of its divisors is an integer number (7150026).

Almost surely, 2^28585859 is an apocalyptic number.

28585859 is a deficient number, since it is larger than the sum of its proper divisors (14245).

28585859 is a wasteful number, since it uses less digits than its factorization.

28585859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14244.

The product of its digits is 1152000, while the sum is 50.

The square root of 28585859 is about 5346.5745108434. The cubic root of 28585859 is about 305.7621679968.

The spelling of 28585859 in words is "twenty-eight million, five hundred eighty-five thousand, eight hundred fifty-nine".