28911168 has 252 divisors, whose sum is σ = 101516688. Its totient is φ = 8087040.

The previous prime is 28911137. The next prime is 28911187. The reversal of 28911168 is 86111982.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

Its product of digits (6912) is a multiple of the sum of its prime factors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2223930 + ... + 2223942.

It is an arithmetic number, because the mean of its divisors is an integer number (402844).

Almost surely, 2^28911168 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28911168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50758344).

28911168 is an abundant number, since it is smaller than the sum of its proper divisors (72605520).

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

28911168 is a wasteful number, since it uses less digits than its factorization.

28911168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64 (or 29 counting only the distinct ones).

The product of its digits is 6912, while the sum is 36.

The square root of 28911168 is about 5376.9106371596. The cubic root of 28911168 is about 306.9176605105.

The spelling of 28911168 in words is "twenty-eight million, nine hundred eleven thousand, one hundred sixty-eight".