28533506 has 16 divisors (see below), whose sum is σ = 44523000. Its totient is φ = 13698048.

The previous prime is 28533469. The next prime is 28533509. The reversal of 28533506 is 60533582.

It can be written as a sum of positive squares in 4 ways, for example, as 26615281 + 1918225 = 5159^2 + 1385^2 .

It is not an unprimeable number, because it can be changed into a prime (28533509) 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 7 ways as a sum of consecutive naturals, for example, 9920 + ... + 12468.

Almost surely, 2^28533506 is an apocalyptic number.

28533506 is a deficient number, since it is larger than the sum of its proper divisors (15989494).

28533506 is a wasteful number, since it uses less digits than its factorization.

28533506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2773.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 28533506 is about 5341.6763286444. The cubic root of 28533506 is about 305.5753932587.

The spelling of 28533506 in words is "twenty-eight million, five hundred thirty-three thousand, five hundred six".