280431 has 6 divisors (see below), whose sum is σ = 405080. Its totient is φ = 186948.

The previous prime is 280411. The next prime is 280451. The reversal of 280431 is 134082.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (280411) and next prime (280451).

It is not a de Polignac number, because 280431 - 2⁷ = 280303 is a prime.

It is a super-2 number, since 2×280431² = 157283091522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 280431.

It is not an unprimeable number, because it can be changed into a prime (280411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15571 + ... + 15588.

2²⁸⁰⁴³¹ is an apocalyptic number.

280431 is a deficient number, since it is larger than the sum of its proper divisors (124649).

280431 is a wasteful number, since it uses less digits than its factorization.

280431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31165 (or 31162 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 280431 is about 529.5573623320. The cubic root of 280431 is about 65.4548763662.

The spelling of 280431 in words is "two hundred eighty thousand, four hundred thirty-one".