276728 has 8 divisors (see below), whose sum is σ = 518880. Its totient is φ = 138360.

The previous prime is 276721. The next prime is 276739. The reversal of 276728 is 827672.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 276694 and 276703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (276721) by changing a digit.

276728 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 as a sum of consecutive naturals, namely, 17288 + ... + 17303.

It is an arithmetic number, because the mean of its divisors is an integer number (64860).

2²⁷⁶⁷²⁸ is an apocalyptic number.

It is an amenable number.

276728 is a deficient number, since it is larger than the sum of its proper divisors (242152).

276728 is a wasteful number, since it uses less digits than its factorization.

276728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34597 (or 34593 counting only the distinct ones).

The product of its digits is 9408, while the sum is 32.

The square root of 276728 is about 526.0494273355. The cubic root of 276728 is about 65.1654954369.

The spelling of 276728 in words is "two hundred seventy-six thousand, seven hundred twenty-eight".