280875 has 32 divisors (see below), whose sum is σ = 539136. Its totient is φ = 127200.

The previous prime is 280871. The next prime is 280879. The reversal of 280875 is 578082.

280875 is a nontrivial binomial coefficient, being equal to C(750, 2).

It is an interprime number because it is at equal distance from previous prime (280871) and next prime (280879).

It is not a de Polignac number, because 280875 - 2² = 280871 is a prime.

280875 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 280875.

It is not an unprimeable number, because it can be changed into a prime (280871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2572 + ... + 2678.

It is an arithmetic number, because the mean of its divisors is an integer number (16848).

2²⁸⁰⁸⁷⁵ is an apocalyptic number.

280875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

280875 is the 749-th triangular number and also the 375-th hexagonal number.

280875 is a deficient number, since it is larger than the sum of its proper divisors (258261).

280875 is a wasteful number, since it uses less digits than its factorization.

280875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 280875 is about 529.9764145696. The cubic root of 280875 is about 65.4894025549.

The spelling of 280875 in words is "two hundred eighty thousand, eight hundred seventy-five".