280067 has 4 divisors (see below), whose sum is σ = 281520. Its totient is φ = 278616.

The previous prime is 280061. The next prime is 280069. The reversal of 280067 is 760082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 760082 = 2 ⋅380041.

It is a cyclic number.

It is not a de Polignac number, because 280067 - 2¹⁶ = 214531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280061) 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, 383 + ... + 840.

It is an arithmetic number, because the mean of its divisors is an integer number (70380).

2²⁸⁰⁰⁶⁷ is an apocalyptic number.

280067 is a deficient number, since it is larger than the sum of its proper divisors (1453).

280067 is a wasteful number, since it uses less digits than its factorization.

280067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1452.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 280067 is about 529.2135674754. The cubic root of 280067 is about 65.4265439172.

The spelling of 280067 in words is "two hundred eighty thousand, sixty-seven".