28103198 has 4 divisors (see below), whose sum is σ = 42154800. Its totient is φ = 14051598.

The previous prime is 28103191. The next prime is 28103203. The reversal of 28103198 is 89130182.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28103191) 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 as a sum of consecutive naturals, namely, 7025798 + ... + 7025801.

It is an arithmetic number, because the mean of its divisors is an integer number (10538700).

Almost surely, 2^28103198 is an apocalyptic number.

28103198 is a deficient number, since it is larger than the sum of its proper divisors (14051602).

28103198 is a wasteful number, since it uses less digits than its factorization.

28103198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14051601.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 28103198 is about 5301.2449481230. The cubic root of 28103198 is about 304.0314992176.

The spelling of 28103198 in words is "twenty-eight million, one hundred three thousand, one hundred ninety-eight".