28544338 has 4 divisors (see below), whose sum is σ = 42816510. Its totient is φ = 14272168.

The previous prime is 28544333. The next prime is 28544407. The reversal of 28544338 is 83344582.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19918369 + 8625969 = 4463^2 + 2937^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28544297 and 28544306.

It is not an unprimeable number, because it can be changed into a prime (28544333) 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 as a sum of consecutive naturals, namely, 7136083 + ... + 7136086.

Almost surely, 2^28544338 is an apocalyptic number.

28544338 is a deficient number, since it is larger than the sum of its proper divisors (14272172).

28544338 is a wasteful number, since it uses less digits than its factorization.

28544338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14272171.

The product of its digits is 92160, while the sum is 37.

The square root of 28544338 is about 5342.6901463589. The cubic root of 28544338 is about 305.6140562712.

It can be divided in two parts, 28544 and 338, that added together give a palindrome (28882).

The spelling of 28544338 in words is "twenty-eight million, five hundred forty-four thousand, three hundred thirty-eight".