28881184 has 24 divisors (see below), whose sum is σ = 57936060. Its totient is φ = 14167296.

The previous prime is 28881163. The next prime is 28881227. The reversal of 28881184 is 48118882.

It can be written as a sum of positive squares in 2 ways, for example, as 26749584 + 2131600 = 5172^2 + 1460^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6819 + ... + 10210.

Almost surely, 2^28881184 is an apocalyptic number.

It is an amenable number.

28881184 is an abundant number, since it is smaller than the sum of its proper divisors (29054876).

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

28881184 is a wasteful number, since it uses less digits than its factorization.

28881184 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17092 (or 17084 counting only the distinct ones).

The product of its digits is 32768, while the sum is 40.

The square root of 28881184 is about 5374.1216956820. The cubic root of 28881184 is about 306.8115215687.

The spelling of 28881184 in words is "twenty-eight million, eight hundred eighty-one thousand, one hundred eighty-four".