280842871 has 4 divisors (see below), whose sum is σ = 281004832. Its totient is φ = 280680912.

The previous prime is 280842869. The next prime is 280842889. The reversal of 280842871 is 178248082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 280842871 - 2¹ = 280842869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280842851) 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, 78351 + ... + 81856.

It is an arithmetic number, because the mean of its divisors is an integer number (70251208).

Almost surely, 2^280842871 is an apocalyptic number.

280842871 is a deficient number, since it is larger than the sum of its proper divisors (161961).

280842871 is a wasteful number, since it uses less digits than its factorization.

280842871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161960.

The product of its (nonzero) digits is 57344, while the sum is 40.

The square root of 280842871 is about 16758.3671937334. The cubic root of 280842871 is about 654.8690537137.

The spelling of 280842871 in words is "two hundred eighty million, eight hundred forty-two thousand, eight hundred seventy-one".