28397184 has 32 divisors (see below), whose sum is σ = 75431040. Its totient is φ = 9465600.

The previous prime is 28397183. The next prime is 28397197. The reversal of 28397184 is 48179382.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (28397183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36592 + ... + 37359.

It is an arithmetic number, because the mean of its divisors is an integer number (2357220).

Almost surely, 2^28397184 is an apocalyptic number.

28397184 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28397184 is an abundant number, since it is smaller than the sum of its proper divisors (47033856).

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

28397184 is an equidigital number, since it uses as much as digits as its factorization.

28397184 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73968 (or 73956 counting only the distinct ones).

The product of its digits is 96768, while the sum is 42.

The square root of 28397184 is about 5328.9008247480. The cubic root of 28397184 is about 305.0879760545.

The spelling of 28397184 in words is "twenty-eight million, three hundred ninety-seven thousand, one hundred eighty-four".