28133522 has 8 divisors (see below), whose sum is σ = 42229836. Its totient is φ = 14056912.

The previous prime is 28133507. The next prime is 28133527. The reversal of 28133522 is 22533182.

It can be written as a sum of positive squares in 2 ways, for example, as 26925721 + 1207801 = 5189^2 + 1099^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 28133491 and 28133500.

It is not an unprimeable number, because it can be changed into a prime (28133527) by changing a digit.

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, 593 + ... + 7524.

Almost surely, 2^28133522 is an apocalyptic number.

28133522 is a deficient number, since it is larger than the sum of its proper divisors (14096314).

28133522 is a wasteful number, since it uses less digits than its factorization.

28133522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9852.

The product of its digits is 2880, while the sum is 26.

The square root of 28133522 is about 5304.1042599104. The cubic root of 28133522 is about 304.1408122475.

The spelling of 28133522 in words is "twenty-eight million, one hundred thirty-three thousand, five hundred twenty-two".