28775303 has 4 divisors (see below), whose sum is σ = 29263080. Its totient is φ = 28287528.

The previous prime is 28775293. The next prime is 28775311. The reversal of 28775303 is 30357782.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28775303 - 2⁴ = 28775287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28775333) 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, 243800 + ... + 243917.

It is an arithmetic number, because the mean of its divisors is an integer number (7315770).

Almost surely, 2^28775303 is an apocalyptic number.

28775303 is a deficient number, since it is larger than the sum of its proper divisors (487777).

28775303 is an equidigital number, since it uses as much as digits as its factorization.

28775303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487776.

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 28775303 is about 5364.2616453712. The cubic root of 28775303 is about 306.4361296408.

The spelling of 28775303 in words is "twenty-eight million, seven hundred seventy-five thousand, three hundred three".