280116 has 36 divisors (see below), whose sum is σ = 733824. Its totient is φ = 90000.

The previous prime is 280103. The next prime is 280121. The reversal of 280116 is 611082.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a plaindrome in base 7.

It is a zygodrome in base 7.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 991 + ... + 1241.

It is an arithmetic number, because the mean of its divisors is an integer number (20384).

2²⁸⁰¹¹⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 280116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (366912).

280116 is an abundant number, since it is smaller than the sum of its proper divisors (453708).

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

280116 is a wasteful number, since it uses less digits than its factorization.

280116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 280116 is about 529.2598605600. The cubic root of 280116 is about 65.4303593301.

Adding to 280116 its reverse (611082), we get a palindrome (891198).

The spelling of 280116 in words is "two hundred eighty thousand, one hundred sixteen".