122768728 has 16 divisors (see below), whose sum is σ = 242307000. Its totient is φ = 58153536.

The previous prime is 122768707. The next prime is 122768743. The reversal of 122768728 is 827867221.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 403693 + ... + 403996.

Almost surely, 2^122768728 is an apocalyptic number.

It is an amenable number.

122768728 is a deficient number, since it is larger than the sum of its proper divisors (119538272).

122768728 is a wasteful number, since it uses less digits than its factorization.

122768728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807714 (or 807710 counting only the distinct ones).

The product of its digits is 150528, while the sum is 43.

The square root of 122768728 is about 11080.1050536536. The cubic root of 122768728 is about 497.0070914083.

The spelling of 122768728 in words is "one hundred twenty-two million, seven hundred sixty-eight thousand, seven hundred twenty-eight".