275721056 has 48 divisors (see below), whose sum is σ = 610019424. Its totient is φ = 121718784.

The previous prime is 275721053. The next prime is 275721119. The reversal of 275721056 is 650127572.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (275721053) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4841 + ... + 23976.

It is an arithmetic number, because the mean of its divisors is an integer number (12708738).

Almost surely, 2^275721056 is an apocalyptic number.

275721056 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

275721056 is an abundant number, since it is smaller than the sum of its proper divisors (334298368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

275721056 is a wasteful number, since it uses less digits than its factorization.

275721056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28863 (or 28855 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 275721056 is about 16604.8503757185. The cubic root of 275721056 is about 650.8635905862.

The spelling of 275721056 in words is "two hundred seventy-five million, seven hundred twenty-one thousand, fifty-six".