28628187 has 16 divisors (see below), whose sum is σ = 46190592. Its totient is φ = 15396480.

The previous prime is 28628177. The next prime is 28628203. The reversal of 28628187 is 78182682.

It is not a de Polignac number, because 28628187 - 2¹⁰ = 28627163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28628107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39739 + ... + 40452.

It is an arithmetic number, because the mean of its divisors is an integer number (2886912).

Almost surely, 2^28628187 is an apocalyptic number.

28628187 is a deficient number, since it is larger than the sum of its proper divisors (17562405).

28628187 is a wasteful number, since it uses less digits than its factorization.

28628187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80218.

The product of its digits is 86016, while the sum is 42.

The square root of 28628187 is about 5350.5314689290. The cubic root of 28628187 is about 305.9130108578.

The spelling of 28628187 in words is "twenty-eight million, six hundred twenty-eight thousand, one hundred eighty-seven".