275128240 has 40 divisors (see below), whose sum is σ = 648449568. Its totient is φ = 108541440.

The previous prime is 275128229. The next prime is 275128253. The reversal of 275128240 is 42821572.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

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 7 ways as a sum of consecutive naturals, for example, 17716 + ... + 29395.

Almost surely, 2^275128240 is an apocalyptic number.

275128240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

275128240 is an abundant number, since it is smaller than the sum of its proper divisors (373321328).

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

275128240 is a wasteful number, since it uses less digits than its factorization.

275128240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47197 (or 47191 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 275128240 is about 16586.9900825918. The cubic root of 275128240 is about 650.3967912608.

The spelling of 275128240 in words is "two hundred seventy-five million, one hundred twenty-eight thousand, two hundred forty".