280002 has 16 divisors (see below), whose sum is σ = 584640. Its totient is φ = 89232.

The previous prime is 280001. The next prime is 280009. The reversal of 280002 is 200082.

It is a super-2 number, since 2×280002² = 156802240008, which contains 22 as substring.

It is a zygodrome in base 7.

It is a self number, because there is not a number n which added to its sum of digits gives 280002.

It is not an unprimeable number, because it can be changed into a prime (280001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 877 + ... + 1152.

It is an arithmetic number, because the mean of its divisors is an integer number (36540).

2²⁸⁰⁰⁰² is an apocalyptic number.

280002 is an abundant number, since it is smaller than the sum of its proper divisors (304638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

280002 is a wasteful number, since it uses less digits than its factorization.

280002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2057.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 280002 is about 529.1521520319. The cubic root of 280002 is about 65.4214819685.

Adding to 280002 its reverse (200082), we get a palindrome (480084).

The spelling of 280002 in words is "two hundred eighty thousand, two".