28122863217782 has 4 divisors (see below), whose sum is σ = 42184294826676. Its totient is φ = 14061431608890.

The previous prime is 28122863217649. The next prime is 28122863217811. The reversal of 28122863217782 is 28771236822182.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7030715804444 + ... + 7030715804447.

It is an arithmetic number, because the mean of its divisors is an integer number (10546073706669).

Almost surely, 2^{28122863217782} is an apocalyptic number.

28122863217782 is a deficient number, since it is larger than the sum of its proper divisors (14061431608894).

28122863217782 is a wasteful number, since it uses less digits than its factorization.

28122863217782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14061431608893.

The product of its digits is 14450688, while the sum is 59.

The spelling of 28122863217782 in words is "twenty-eight trillion, one hundred twenty-two billion, eight hundred sixty-three million, two hundred seventeen thousand, seven hundred eighty-two".