28375033 has 4 divisors (see below), whose sum is σ = 28413568. Its totient is φ = 28336500.

The previous prime is 28375019. The next prime is 28375051. The reversal of 28375033 is 33057382.

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, and also an emirpimes, since its reverse is a distinct semiprime: 33057382 = 2 ⋅16528691.

It is a cyclic number.

It is not a de Polignac number, because 28375033 - 2¹⁷ = 28243961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28374986 and 28375004.

It is not an unprimeable number, because it can be changed into a prime (28375003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18141 + ... + 19642.

It is an arithmetic number, because the mean of its divisors is an integer number (7103392).

Almost surely, 2^28375033 is an apocalyptic number.

It is an amenable number.

28375033 is a deficient number, since it is larger than the sum of its proper divisors (38535).

28375033 is an equidigital number, since it uses as much as digits as its factorization.

28375033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38534.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 28375033 is about 5326.8220356982. The cubic root of 28375033 is about 305.0086282608.

The spelling of 28375033 in words is "twenty-eight million, three hundred seventy-five thousand, thirty-three".