272128778 has 32 divisors (see below), whose sum is σ = 437944320. Its totient is φ = 126520240.

The previous prime is 272128763. The next prime is 272128783. The reversal of 272128778 is 877821272.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 412613 + ... + 413271.

It is an arithmetic number, because the mean of its divisors is an integer number (13685760).

Almost surely, 2^272128778 is an apocalyptic number.

272128778 is a deficient number, since it is larger than the sum of its proper divisors (165815542).

272128778 is a wasteful number, since it uses less digits than its factorization.

272128778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922.

The product of its digits is 175616, while the sum is 44.

The square root of 272128778 is about 16496.3261970658. The cubic root of 272128778 is about 648.0245967522.

The spelling of 272128778 in words is "two hundred seventy-two million, one hundred twenty-eight thousand, seven hundred seventy-eight".