28188192 has 48 divisors (see below), whose sum is σ = 74269440. Its totient is φ = 9361152.

The previous prime is 28188157. The next prime is 28188221. The reversal of 28188192 is 29188182.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 28188192.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45678 + ... + 46290.

It is an arithmetic number, because the mean of its divisors is an integer number (1547280).

Almost surely, 2^28188192 is an apocalyptic number.

It is an amenable number.

28188192 is an abundant number, since it is smaller than the sum of its proper divisors (46081248).

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

28188192 is a wasteful number, since it uses less digits than its factorization.

28188192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1105 (or 1097 counting only the distinct ones).

The product of its digits is 18432, while the sum is 39.

The square root of 28188192 is about 5309.2553150136. The cubic root of 28188192 is about 304.3376903055.

The spelling of 28188192 in words is "twenty-eight million, one hundred eighty-eight thousand, one hundred ninety-two".