275388128 has 72 divisors (see below), whose sum is σ = 591433920. Its totient is φ = 126074880.

The previous prime is 275388121. The next prime is 275388133. The reversal of 275388128 is 821883572.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (275388121) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 357728 + ... + 358496.

It is an arithmetic number, because the mean of its divisors is an integer number (8214360).

Almost surely, 2^275388128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 275388128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295716960).

275388128 is an abundant number, since it is smaller than the sum of its proper divisors (316045792).

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

275388128 is a wasteful number, since it uses less digits than its factorization.

275388128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848 (or 821 counting only the distinct ones).

The product of its digits is 215040, while the sum is 44.

The square root of 275388128 is about 16594.8223250507. The cubic root of 275388128 is about 650.6015165516.

The spelling of 275388128 in words is "two hundred seventy-five million, three hundred eighty-eight thousand, one hundred twenty-eight".