280367 has 4 divisors (see below), whose sum is σ = 281736. Its totient is φ = 279000.

The previous prime is 280351. The next prime is 280373. The reversal of 280367 is 763082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 763082 = 2 ⋅381541.

It is a cyclic number.

It is not a de Polignac number, because 280367 - 2⁴ = 280351 is a prime.

It is an Ulam number.

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 280367.

It is not an unprimeable number, because it can be changed into a prime (280327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308 + ... + 809.

It is an arithmetic number, because the mean of its divisors is an integer number (70434).

2²⁸⁰³⁶⁷ is an apocalyptic number.

280367 is a deficient number, since it is larger than the sum of its proper divisors (1369).

280367 is a wasteful number, since it uses less digits than its factorization.

280367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 280367 is about 529.4969310582. The cubic root of 280367 is about 65.4498966138.

The spelling of 280367 in words is "two hundred eighty thousand, three hundred sixty-seven".