28813686 has 16 divisors (see below), whose sum is σ = 62866368. Its totient is φ = 8731400.

The previous prime is 28813627. The next prime is 28813723. The reversal of 28813686 is 68631882.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218220 + ... + 218351.

It is an arithmetic number, because the mean of its divisors is an integer number (3929148).

Almost surely, 2^28813686 is an apocalyptic number.

28813686 is an abundant number, since it is smaller than the sum of its proper divisors (34052682).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28813686 is a wasteful number, since it uses less digits than its factorization.

28813686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436587.

The product of its digits is 110592, while the sum is 42.

The square root of 28813686 is about 5367.8381123130. The cubic root of 28813686 is about 306.5723194854.

The spelling of 28813686 in words is "twenty-eight million, eight hundred thirteen thousand, six hundred eighty-six".