280112 has 40 divisors (see below), whose sum is σ = 645792. Its totient is φ = 115200.

The previous prime is 280103. The next prime is 280121. The reversal of 280112 is 211082.

280112 = T₁₉₃ + T₁₉₄ + ... + T₂₀₆.

280112 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (280103) and next prime (280121).

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4562 + ... + 4622.

2²⁸⁰¹¹² 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 280112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (322896).

280112 is an abundant number, since it is smaller than the sum of its proper divisors (365680).

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

280112 is a wasteful number, since it uses less digits than its factorization.

280112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 280112 is about 529.2560816845. The cubic root of 280112 is about 65.4300478845.

Adding to 280112 its sum of digits (14), we get a triangular number (280126 = T₇₄₈).

Adding to 280112 its reverse (211082), we get a palindrome (491194).

The spelling of 280112 in words is "two hundred eighty thousand, one hundred twelve".