28442633 has 4 divisors (see below), whose sum is σ = 28708560. Its totient is φ = 28176708.

The previous prime is 28442627. The next prime is 28442641. The reversal of 28442633 is 33624482.

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 a de Polignac number, because none of the positive numbers 2^k-28442633 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28442633.

It is not an unprimeable number, because it can be changed into a prime (28442833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132803 + ... + 133016.

It is an arithmetic number, because the mean of its divisors is an integer number (7177140).

Almost surely, 2^28442633 is an apocalyptic number.

It is an amenable number.

28442633 is a deficient number, since it is larger than the sum of its proper divisors (265927).

28442633 is a wasteful number, since it uses less digits than its factorization.

28442633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265926.

The product of its digits is 27648, while the sum is 32.

The square root of 28442633 is about 5333.1635077128. The cubic root of 28442633 is about 305.2506512529.

The spelling of 28442633 in words is "twenty-eight million, four hundred forty-two thousand, six hundred thirty-three".