22728463 has 4 divisors (see below), whose sum is σ = 22764240. Its totient is φ = 22692688.

The previous prime is 22728457. The next prime is 22728491. The reversal of 22728463 is 36482722.

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 22728463 - 2¹⁷ = 22597391 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 (22728403) 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, 16918 + ... + 18211.

It is an arithmetic number, because the mean of its divisors is an integer number (5691060).

Almost surely, 2^22728463 is an apocalyptic number.

22728463 is a deficient number, since it is larger than the sum of its proper divisors (35777).

22728463 is an equidigital number, since it uses as much as digits as its factorization.

22728463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35776.

The product of its digits is 32256, while the sum is 34.

The square root of 22728463 is about 4767.4377814503. The cubic root of 22728463 is about 283.2631123173.

The spelling of 22728463 in words is "twenty-two million, seven hundred twenty-eight thousand, four hundred sixty-three".