28383875 has 16 divisors (see below), whose sum is σ = 38150112. Its totient is φ = 20959200.

The previous prime is 28383871. The next prime is 28383881. The reversal of 28383875 is 57838382.

It is not a de Polignac number, because 28383875 - 2² = 28383871 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (28383871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7109 + ... + 10358.

It is an arithmetic number, because the mean of its divisors is an integer number (2384382).

Almost surely, 2^28383875 is an apocalyptic number.

28383875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28383875 is a deficient number, since it is larger than the sum of its proper divisors (9766237).

28383875 is a wasteful number, since it uses less digits than its factorization.

28383875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17495 (or 17485 counting only the distinct ones).

The product of its digits is 322560, while the sum is 44.

The square root of 28383875 is about 5327.6519218132. The cubic root of 28383875 is about 305.0403064173.

The spelling of 28383875 in words is "twenty-eight million, three hundred eighty-three thousand, eight hundred seventy-five".