275428 has 12 divisors (see below), whose sum is σ = 495292. Its totient is φ = 133920.

The previous prime is 275423. The next prime is 275447. The reversal of 275428 is 824572.

It can be written as a sum of positive squares in 2 ways, for example, as 97344 + 178084 = 312^2 + 422^2 .

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 275396 and 275405.

It is not an unprimeable number, because it can be changed into a prime (275423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 783 + ... + 1078.

2²⁷⁵⁴²⁸ is an apocalyptic number.

It is an amenable number.

275428 is a deficient number, since it is larger than the sum of its proper divisors (219864).

275428 is a wasteful number, since it uses less digits than its factorization.

275428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1902 (or 1900 counting only the distinct ones).

The product of its digits is 4480, while the sum is 28.

The square root of 275428 is about 524.8123474157. The cubic root of 275428 is about 65.0632914095.

It can be divided in two parts, 275 and 428, that added together give a triangular number (703 = T₃₇).

The spelling of 275428 in words is "two hundred seventy-five thousand, four hundred twenty-eight".