28050503 has 4 divisors (see below), whose sum is σ = 30208248. Its totient is φ = 25892760.

The previous prime is 28050497. The next prime is 28050509. The reversal of 28050503 is 30505082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30505082 = 2 ⋅15252541.

It is an interprime number because it is at equal distance from previous prime (28050497) and next prime (28050509).

It is a cyclic number.

It is not a de Polignac number, because 28050503 - 2⁴ = 28050487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28050509) 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, 1078853 + ... + 1078878.

It is an arithmetic number, because the mean of its divisors is an integer number (7552062).

Almost surely, 2^28050503 is an apocalyptic number.

28050503 is a deficient number, since it is larger than the sum of its proper divisors (2157745).

28050503 is a wasteful number, since it uses less digits than its factorization.

28050503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2157744.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 28050503 is about 5296.2725571859. The cubic root of 28050503 is about 303.8413552149.

Adding to 28050503 its reverse (30505082), we get a palindrome (58555585).

The spelling of 28050503 in words is "twenty-eight million, fifty thousand, five hundred three".