28675687 has 16 divisors (see below), whose sum is σ = 31352832. Its totient is φ = 26150080.

The previous prime is 28675663. The next prime is 28675697. The reversal of 28675687 is 78657682.

It is not a de Polignac number, because 28675687 - 2¹¹ = 28673639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28675687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28675627) 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, 43998 + ... + 44644.

It is an arithmetic number, because the mean of its divisors is an integer number (1959552).

Almost surely, 2^28675687 is an apocalyptic number.

28675687 is a deficient number, since it is larger than the sum of its proper divisors (2677145).

28675687 is a wasteful number, since it uses less digits than its factorization.

28675687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758.

The product of its digits is 1128960, while the sum is 49.

The square root of 28675687 is about 5354.9684406166. The cubic root of 28675687 is about 306.0821080586.

The spelling of 28675687 in words is "twenty-eight million, six hundred seventy-five thousand, six hundred eighty-seven".