28315017 has 12 divisors (see below), whose sum is σ = 41146560. Its totient is φ = 18762648.

The previous prime is 28315003. The next prime is 28315033. The reversal of 28315017 is 71051382.

It is not a de Polignac number, because 28315017 - 2⁷ = 28314889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28315037) 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, 7917 + ... + 10922.

It is an arithmetic number, because the mean of its divisors is an integer number (3428880).

Almost surely, 2^28315017 is an apocalyptic number.

It is an amenable number.

28315017 is a deficient number, since it is larger than the sum of its proper divisors (12831543).

28315017 is a wasteful number, since it uses less digits than its factorization.

28315017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19012 (or 19009 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 28315017 is about 5321.1856761440. The cubic root of 28315017 is about 304.7934353372.

Adding to 28315017 its reverse (71051382), we get a palindrome (99366399).

The spelling of 28315017 in words is "twenty-eight million, three hundred fifteen thousand, seventeen".