121935728 has 20 divisors (see below), whose sum is σ = 236422368. Its totient is φ = 60923520.

The previous prime is 121935707. The next prime is 121935761. The reversal of 121935728 is 827539121.

It is a junction number, because it is equal to n+sod(n) for n = 121935691 and 121935700.

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, 38825 + ... + 41847.

Almost surely, 2^121935728 is an apocalyptic number.

It is an amenable number.

121935728 is a deficient number, since it is larger than the sum of its proper divisors (114486640).

121935728 is a wasteful number, since it uses less digits than its factorization.

121935728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5552 (or 5546 counting only the distinct ones).

The product of its digits is 30240, while the sum is 38.

The square root of 121935728 is about 11042.4511771617. The cubic root of 121935728 is about 495.8804559284.

The spelling of 121935728 in words is "one hundred twenty-one million, nine hundred thirty-five thousand, seven hundred twenty-eight".