275643128 has 16 divisors (see below), whose sum is σ = 521662680. Its totient is φ = 136533088.

The previous prime is 275643107. The next prime is 275643131. The reversal of 275643128 is 821346572.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 275643091 and 275643100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160151 + ... + 161862.

Almost surely, 2^275643128 is an apocalyptic number.

It is an amenable number.

275643128 is a deficient number, since it is larger than the sum of its proper divisors (246019552).

275643128 is a wasteful number, since it uses less digits than its factorization.

275643128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322126 (or 322122 counting only the distinct ones).

The product of its digits is 80640, while the sum is 38.

The square root of 275643128 is about 16602.5036666161. The cubic root of 275643128 is about 650.8022661957.

The spelling of 275643128 in words is "two hundred seventy-five million, six hundred forty-three thousand, one hundred twenty-eight".