28342144 has 32 divisors (see below), whose sum is σ = 56824200. Its totient is φ = 14080512.

The previous prime is 28342133. The next prime is 28342157. The reversal of 28342144 is 44124382.

It is a happy number.

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

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 22294 + ... + 23530.

Almost surely, 2^28342144 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 28342144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28412100).

28342144 is an abundant number, since it is smaller than the sum of its proper divisors (28482056).

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

28342144 is a wasteful number, since it uses less digits than its factorization.

28342144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1430 (or 1418 counting only the distinct ones).

The product of its digits is 6144, while the sum is 28.

The square root of 28342144 is about 5323.7340279169. The cubic root of 28342144 is about 304.8907393286.

The spelling of 28342144 in words is "twenty-eight million, three hundred forty-two thousand, one hundred forty-four".