28812633 has 4 divisors (see below), whose sum is σ = 38416848. Its totient is φ = 19208420.

The previous prime is 28812611. The next prime is 28812647. The reversal of 28812633 is 33621882.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28812633 - 2¹⁰ = 28811609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28812594 and 28812603.

It is not an unprimeable number, because it can be changed into a prime (28812673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4802103 + ... + 4802108.

It is an arithmetic number, because the mean of its divisors is an integer number (9604212).

Almost surely, 2^28812633 is an apocalyptic number.

It is an amenable number.

28812633 is a deficient number, since it is larger than the sum of its proper divisors (9604215).

28812633 is an equidigital number, since it uses as much as digits as its factorization.

28812633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9604214.

The product of its digits is 13824, while the sum is 33.

The square root of 28812633 is about 5367.7400272368. The cubic root of 28812633 is about 306.5685848645.

Subtracting 28812633 from its reverse (33621882), we obtain a square (4809249 = 2193²).

It can be divided in two parts, 288 and 12633, that added together give a palindrome (12921).

The spelling of 28812633 in words is "twenty-eight million, eight hundred twelve thousand, six hundred thirty-three".