28763243 has 4 divisors (see below), whose sum is σ = 28776600. Its totient is φ = 28749888.

The previous prime is 28763239. The next prime is 28763249. The reversal of 28763243 is 34236782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34236782 = 2 ⋅17118391.

It is a cyclic number.

It is not a de Polignac number, because 28763243 - 2² = 28763239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28763249) 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, 2630 + ... + 8027.

It is an arithmetic number, because the mean of its divisors is an integer number (7194150).

Almost surely, 2^28763243 is an apocalyptic number.

28763243 is a deficient number, since it is larger than the sum of its proper divisors (13357).

28763243 is a wasteful number, since it uses less digits than its factorization.

28763243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13356.

The product of its digits is 48384, while the sum is 35.

The square root of 28763243 is about 5363.1374213235. The cubic root of 28763243 is about 306.3933135711.

The spelling of 28763243 in words is "twenty-eight million, seven hundred sixty-three thousand, two hundred forty-three".