28984144 has 20 divisors (see below), whose sum is σ = 64179424. Its totient is φ = 12421728.

The previous prime is 28984127. The next prime is 28984157. The reversal of 28984144 is 44148982.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28984097 and 28984106.

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, 129282 + ... + 129505.

Almost surely, 2^28984144 is an apocalyptic number.

It is an amenable number.

28984144 is an abundant number, since it is smaller than the sum of its proper divisors (35195280).

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

28984144 is a wasteful number, since it uses less digits than its factorization.

28984144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258802 (or 258796 counting only the distinct ones).

The product of its digits is 73728, while the sum is 40.

The square root of 28984144 is about 5383.6924132049. The cubic root of 28984144 is about 307.1756785034.

The spelling of 28984144 in words is "twenty-eight million, nine hundred eighty-four thousand, one hundred forty-four".