28517001 has 16 divisors (see below), whose sum is σ = 38860800. Its totient is φ = 18595728.

The previous prime is 28516991. The next prime is 28517039. The reversal of 28517001 is 10071582.

It is not a de Polignac number, because 28517001 - 2⁹ = 28516489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28517051) 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 15 ways as a sum of consecutive naturals, for example, 64740 + ... + 65178.

It is an arithmetic number, because the mean of its divisors is an integer number (2428800).

Almost surely, 2^28517001 is an apocalyptic number.

It is an amenable number.

28517001 is a deficient number, since it is larger than the sum of its proper divisors (10343799).

28517001 is a wasteful number, since it uses less digits than its factorization.

28517001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868.

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 28517001 is about 5340.1311781641. The cubic root of 28517001 is about 305.5164626032.

Adding to 28517001 its reverse (10071582), we get a palindrome (38588583).

The spelling of 28517001 in words is "twenty-eight million, five hundred seventeen thousand, one".