28420033 has 8 divisors (see below), whose sum is σ = 29868608. Its totient is φ = 27007344.

The previous prime is 28420027. The next prime is 28420037. The reversal of 28420033 is 33002482.

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

It is a cyclic number.

It is not a de Polignac number, because 28420033 - 2¹⁷ = 28288961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28419986 and 28420013.

It is not an unprimeable number, because it can be changed into a prime (28420037) 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 in 7 ways as a sum of consecutive naturals, for example, 7341 + ... + 10522.

It is an arithmetic number, because the mean of its divisors is an integer number (3733576).

Almost surely, 2^28420033 is an apocalyptic number.

It is an amenable number.

28420033 is a deficient number, since it is larger than the sum of its proper divisors (1448575).

28420033 is a wasteful number, since it uses less digits than its factorization.

28420033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17943.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 28420033 is about 5331.0442691840. The cubic root of 28420033 is about 305.1697809539.

The spelling of 28420033 in words is "twenty-eight million, four hundred twenty thousand, thirty-three".