28634203 has 4 divisors (see below), whose sum is σ = 30836848. Its totient is φ = 26431560.

The previous prime is 28634201. The next prime is 28634213. The reversal of 28634203 is 30243682.

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

It is a cyclic number.

It is not a de Polignac number, because 28634203 - 2¹ = 28634201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28634201) 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, 1101303 + ... + 1101328.

It is an arithmetic number, because the mean of its divisors is an integer number (7709212).

Almost surely, 2^28634203 is an apocalyptic number.

28634203 is a deficient number, since it is larger than the sum of its proper divisors (2202645).

28634203 is a wasteful number, since it uses less digits than its factorization.

28634203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2202644.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 28634203 is about 5351.0936265403. The cubic root of 28634203 is about 305.9344378029.

Adding to 28634203 its reverse (30243682), we get a palindrome (58877885).

The spelling of 28634203 in words is "twenty-eight million, six hundred thirty-four thousand, two hundred three".