28224658643 has 4 divisors (see below), whose sum is σ = 28257517080. Its totient is φ = 28191800208.

The previous prime is 28224658573. The next prime is 28224658661. The reversal of 28224658643 is 34685642282.

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 28224658643 - 2⁸ = 28224658387 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28224658591 and 28224658600.

It is not an unprimeable number, because it can be changed into a prime (28224658543) 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, 16427930 + ... + 16429647.

It is an arithmetic number, because the mean of its divisors is an integer number (7064379270).

Almost surely, 2^28224658643 is an apocalyptic number.

28224658643 is a deficient number, since it is larger than the sum of its proper divisors (32858437).

28224658643 is an equidigital number, since it uses as much as digits as its factorization.

28224658643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32858436.

The product of its digits is 4423680, while the sum is 50.

The spelling of 28224658643 in words is "twenty-eight billion, two hundred twenty-four million, six hundred fifty-eight thousand, six hundred forty-three".