275820 has 24 divisors (see below), whose sum is σ = 772464. Its totient is φ = 73536.

The previous prime is 275813. The next prime is 275827. The reversal of 275820 is 28572.

It is an interprime number because it is at equal distance from previous prime (275813) and next prime (275827).

It is not an unprimeable number, because it can be changed into a prime (275827) by changing a digit.

275820 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 7 ways as a sum of consecutive naturals, for example, 2239 + ... + 2358.

It is an arithmetic number, because the mean of its divisors is an integer number (32186).

2²⁷⁵⁸²⁰ is an apocalyptic number.

275820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

275820 is an abundant number, since it is smaller than the sum of its proper divisors (496644).

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

275820 is a wasteful number, since it uses less digits than its factorization.

275820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4609 (or 4607 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 275820 is about 525.1856814499. The cubic root of 275820 is about 65.0941436588.

The spelling of 275820 in words is "two hundred seventy-five thousand, eight hundred twenty".