28261168 has 40 divisors (see below), whose sum is σ = 59714928. Its totient is φ = 12878592.

The previous prime is 28261141. The next prime is 28261169. The reversal of 28261168 is 86116282.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28261169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16446 + ... + 18082.

Almost surely, 2^28261168 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 28261168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29857464).

28261168 is an abundant number, since it is smaller than the sum of its proper divisors (31453760).

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

28261168 is a wasteful number, since it uses less digits than its factorization.

28261168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1741 (or 1735 counting only the distinct ones).

The product of its digits is 9216, while the sum is 34.

The square root of 28261168 is about 5316.1233996212. The cubic root of 28261168 is about 304.6000957953.

The spelling of 28261168 in words is "twenty-eight million, two hundred sixty-one thousand, one hundred sixty-eight".