121932728 has 16 divisors (see below), whose sum is σ = 240657000. Its totient is φ = 57757536.

The previous prime is 121932719. The next prime is 121932751. The reversal of 121932728 is 827239121.

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, 400943 + ... + 401246.

Almost surely, 2^121932728 is an apocalyptic number.

It is an amenable number.

121932728 is a deficient number, since it is larger than the sum of its proper divisors (118724272).

121932728 is a wasteful number, since it uses less digits than its factorization.

121932728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802214 (or 802210 counting only the distinct ones).

The product of its digits is 12096, while the sum is 35.

The square root of 121932728 is about 11042.3153369210. The cubic root of 121932728 is about 495.8763891587.

The spelling of 121932728 in words is "one hundred twenty-one million, nine hundred thirty-two thousand, seven hundred twenty-eight".