28144036 has 12 divisors (see below), whose sum is σ = 50950620. Its totient is φ = 13586720.

The previous prime is 28144033. The next prime is 28144043. The reversal of 28144036 is 63044182.

It can be written as a sum of positive squares in 2 ways, for example, as 20304036 + 7840000 = 4506^2 + 2800^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28143995 and 28144013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28144033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121195 + ... + 121426.

It is an arithmetic number, because the mean of its divisors is an integer number (4245885).

Almost surely, 2^28144036 is an apocalyptic number.

It is an amenable number.

28144036 is a deficient number, since it is larger than the sum of its proper divisors (22806584).

28144036 is a wasteful number, since it uses less digits than its factorization.

28144036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242654 (or 242652 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 28144036 is about 5305.0952866089. The cubic root of 28144036 is about 304.1786951478.

The spelling of 28144036 in words is "twenty-eight million, one hundred forty-four thousand, thirty-six".