28219363 has 4 divisors (see below), whose sum is σ = 28422520. Its totient is φ = 28016208.

The previous prime is 28219361. The next prime is 28219381. The reversal of 28219363 is 36391282.

It is a happy number.

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 28219363 - 2¹ = 28219361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28219361) 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, 101370 + ... + 101647.

It is an arithmetic number, because the mean of its divisors is an integer number (7105630).

Almost surely, 2^28219363 is an apocalyptic number.

28219363 is a deficient number, since it is larger than the sum of its proper divisors (203157).

28219363 is a wasteful number, since it uses less digits than its factorization.

28219363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203156.

The product of its digits is 15552, while the sum is 34.

The square root of 28219363 is about 5312.1900380163. The cubic root of 28219363 is about 304.4498296427.

It can be divided in two parts, 28219 and 363, that added together give a palindrome (28582).

The spelling of 28219363 in words is "twenty-eight million, two hundred nineteen thousand, three hundred sixty-three".