28223066643 has 8 divisors (see below), whose sum is σ = 37632745728. Its totient is φ = 18814382664.

The previous prime is 28223066629. The next prime is 28223066657. The reversal of 28223066643 is 34666032282.

It is an interprime number because it is at equal distance from previous prime (28223066629) and next prime (28223066657).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28223066643 - 2⁸ = 28223066387 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28223066595 and 28223066604.

It is not an unprimeable number, because it can be changed into a prime (28223064643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179871 + ... + 297992.

It is an arithmetic number, because the mean of its divisors is an integer number (4704093216).

Almost surely, 2^28223066643 is an apocalyptic number.

28223066643 is a deficient number, since it is larger than the sum of its proper divisors (9409679085).

28223066643 is a wasteful number, since it uses less digits than its factorization.

28223066643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497553.

The product of its (nonzero) digits is 497664, while the sum is 42.

The spelling of 28223066643 in words is "twenty-eight billion, two hundred twenty-three million, sixty-six thousand, six hundred forty-three".