28103075 has 48 divisors (see below), whose sum is σ = 46830336. Its totient is φ = 16156800.

The previous prime is 28103003. The next prime is 28103077. The reversal of 28103075 is 57030182.

It is not a de Polignac number, because 28103075 - 2¹⁰ = 28102051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28103077) 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, 24464 + ... + 25586.

It is an arithmetic number, because the mean of its divisors is an integer number (975632).

Almost surely, 2^28103075 is an apocalyptic number.

28103075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28103075 is a deficient number, since it is larger than the sum of its proper divisors (18727261).

28103075 is a wasteful number, since it uses less digits than its factorization.

28103075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1164 (or 1159 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 28103075 is about 5301.2333470618. The cubic root of 28103075 is about 304.0310556628.

It can be divided in two parts, 2810 and 3075, that added together give a palindrome (5885).

The spelling of 28103075 in words is "twenty-eight million, one hundred three thousand, seventy-five".