28223066438 has 32 divisors (see below), whose sum is σ = 50646601728. Its totient is φ = 11540541600.

The previous prime is 28223066437. The next prime is 28223066453. The reversal of 28223066438 is 83466032282.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28223066437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 427145 + ... + 488772.

It is an arithmetic number, because the mean of its divisors is an integer number (1582706304).

Almost surely, 2^28223066438 is an apocalyptic number.

28223066438 is a deficient number, since it is larger than the sum of its proper divisors (22423535290).

28223066438 is a wasteful number, since it uses less digits than its factorization.

28223066438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916028.

The product of its (nonzero) digits is 663552, while the sum is 44.

The spelling of 28223066438 in words is "twenty-eight billion, two hundred twenty-three million, sixty-six thousand, four hundred thirty-eight".