28303875 has 48 divisors (see below), whose sum is σ = 51673440. Its totient is φ = 14904000.

The previous prime is 28303871. The next prime is 28303879. The reversal of 28303875 is 57830382.

It is an interprime number because it is at equal distance from previous prime (28303871) and next prime (28303879).

It is not a de Polignac number, because 28303875 - 2² = 28303871 is a prime.

It is a super-2 number, since 2×28303875² = 1602218680031250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28303871) 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 47 ways as a sum of consecutive naturals, for example, 156285 + ... + 156465.

It is an arithmetic number, because the mean of its divisors is an integer number (1076530).

Almost surely, 2^28303875 is an apocalyptic number.

28303875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28303875 is a deficient number, since it is larger than the sum of its proper divisors (23369565).

28303875 is a wasteful number, since it uses less digits than its factorization.

28303875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 28303875 is about 5320.1386260134. The cubic root of 28303875 is about 304.7534512067.

The spelling of 28303875 in words is "twenty-eight million, three hundred three thousand, eight hundred seventy-five".