280427 has 12 divisors (see below), whose sum is σ = 335160. Its totient is φ = 233856.

The previous prime is 280411. The next prime is 280451. The reversal of 280427 is 724082.

It is not a de Polignac number, because 280427 - 2⁴ = 280411 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 280427.

It is not an unprimeable number, because it can be changed into a prime (280487) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2843 + ... + 2939.

It is an arithmetic number, because the mean of its divisors is an integer number (27930).

2²⁸⁰⁴²⁷ is an apocalyptic number.

280427 is a deficient number, since it is larger than the sum of its proper divisors (54733).

280427 is an equidigital number, since it uses as much as digits as its factorization.

280427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 163 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 280427 is about 529.5535855794. The cubic root of 280427 is about 65.4545651538.

It can be divided in two parts, 280 and 427, that added together give a palindrome (707).

The spelling of 280427 in words is "two hundred eighty thousand, four hundred twenty-seven".