28103147 has 4 divisors (see below), whose sum is σ = 29582280. Its totient is φ = 26624016.

The previous prime is 28103111. The next prime is 28103177. The reversal of 28103147 is 74130182.

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

It is not a de Polignac number, because 28103147 - 2⁸ = 28102891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28103177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 739538 + ... + 739575.

It is an arithmetic number, because the mean of its divisors is an integer number (7395570).

Almost surely, 2^28103147 is an apocalyptic number.

28103147 is a deficient number, since it is larger than the sum of its proper divisors (1479133).

28103147 is a wasteful number, since it uses less digits than its factorization.

28103147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1479132.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 28103147 is about 5301.2401379300. The cubic root of 28103147 is about 304.0313153048.

The spelling of 28103147 in words is "twenty-eight million, one hundred three thousand, one hundred forty-seven".