28644222422 has 8 divisors (see below), whose sum is σ = 43346567016. Its totient is φ = 14195366752.

The previous prime is 28644222419. The next prime is 28644222443. The reversal of 28644222422 is 22422244682.

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

It is a super-2 number, since 2×28644222422² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63371948 + ... + 63372399.

It is an arithmetic number, because the mean of its divisors is an integer number (5418320877).

Almost surely, 2^28644222422 is an apocalyptic number.

28644222422 is a deficient number, since it is larger than the sum of its proper divisors (14702344594).

28644222422 is a wasteful number, since it uses less digits than its factorization.

28644222422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126744462.

The product of its digits is 196608, while the sum is 38.

The spelling of 28644222422 in words is "twenty-eight billion, six hundred forty-four million, two hundred twenty-two thousand, four hundred twenty-two".