28103104 has 28 divisors (see below), whose sum is σ = 55975504. Its totient is φ = 13999104.

The previous prime is 28103077. The next prime is 28103111. The reversal of 28103104 is 40130182.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 20917 + ... + 22219.

Almost surely, 2^28103104 is an apocalyptic number.

It is an amenable number.

28103104 is a deficient number, since it is larger than the sum of its proper divisors (27872400).

28103104 is a wasteful number, since it uses less digits than its factorization.

28103104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1652 (or 1642 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 28103104 is about 5301.2360822736. The cubic root of 28103104 is about 304.0311602408.

Adding to 28103104 its reverse (40130182), we get a palindrome (68233286).

The spelling of 28103104 in words is "twenty-eight million, one hundred three thousand, one hundred four".