28163286 has 24 divisors (see below), whose sum is σ = 61882704. Its totient is φ = 9255120.

The previous prime is 28163243. The next prime is 28163287. The reversal of 28163286 is 68236182.

It is a self number, because there is not a number n which added to its sum of digits gives 28163286.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28163287) 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, 9741 + ... + 12296.

It is an arithmetic number, because the mean of its divisors is an integer number (2578446).

Almost surely, 2^28163286 is an apocalyptic number.

28163286 is an abundant number, since it is smaller than the sum of its proper divisors (33719418).

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

28163286 is a wasteful number, since it uses less digits than its factorization.

28163286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22116 (or 22113 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 28163286 is about 5306.9092699989. The cubic root of 28163286 is about 304.2480302092.

The spelling of 28163286 in words is "twenty-eight million, one hundred sixty-three thousand, two hundred eighty-six".