273428 has 12 divisors (see below), whose sum is σ = 506772. Its totient is φ = 128640.

The previous prime is 273367. The next prime is 273433. The reversal of 273428 is 824372.

273428 = T₇₇ + T₇₈ + ... + T₁₂₇.

It can be written as a sum of positive squares in 2 ways, for example, as 103684 + 169744 = 322^2 + 412^2 .

It is a junction number, because it is equal to n+sod(n) for n = 273397 and 273406.

It is a congruent number.

It is an unprimeable number.

273428 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1943 + ... + 2078.

It is an arithmetic number, because the mean of its divisors is an integer number (42231).

2²⁷³⁴²⁸ is an apocalyptic number.

It is an amenable number.

273428 is a deficient number, since it is larger than the sum of its proper divisors (233344).

273428 is a wasteful number, since it uses less digits than its factorization.

273428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4042 (or 4040 counting only the distinct ones).

The product of its digits is 2688, while the sum is 26.

The square root of 273428 is about 522.9034327675. The cubic root of 273428 is about 64.9054245891.

The spelling of 273428 in words is "two hundred seventy-three thousand, four hundred twenty-eight".