28687113 has 24 divisors (see below), whose sum is σ = 51000768. Its totient is φ = 15131232.

The previous prime is 28687097. The next prime is 28687117. The reversal of 28687113 is 31178682.

It is not a de Polignac number, because 28687113 - 2⁴ = 28687097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28687117) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16695 + ... + 18332.

It is an arithmetic number, because the mean of its divisors is an integer number (2125032).

Almost surely, 2^28687113 is an apocalyptic number.

It is an amenable number.

28687113 is a deficient number, since it is larger than the sum of its proper divisors (22313655).

28687113 is a wasteful number, since it uses less digits than its factorization.

28687113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35053 (or 35050 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 28687113 is about 5356.0351940591. The cubic root of 28687113 is about 306.1227560794.

The spelling of 28687113 in words is "twenty-eight million, six hundred eighty-seven thousand, one hundred thirteen".