28590117 has 12 divisors (see below), whose sum is σ = 40233600. Its totient is φ = 18056232.

The previous prime is 28590103. The next prime is 28590139. The reversal of 28590117 is 71109582.

It is not a de Polignac number, because 28590117 - 2⁴ = 28590101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28590187) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12117 + ... + 14282.

It is an arithmetic number, because the mean of its divisors is an integer number (3352800).

Almost surely, 2^28590117 is an apocalyptic number.

It is an amenable number.

28590117 is a deficient number, since it is larger than the sum of its proper divisors (11643483).

28590117 is a wasteful number, since it uses less digits than its factorization.

28590117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26440 (or 26421 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 28590117 is about 5346.9726948994. The cubic root of 28590117 is about 305.7773488207. Note that the first 3 decimals are identical.

Adding to 28590117 its reverse (71109582), we get a palindrome (99699699).

The spelling of 28590117 in words is "twenty-eight million, five hundred ninety thousand, one hundred seventeen".