280104 has 32 divisors (see below), whose sum is σ = 764640. Its totient is φ = 84800.

The previous prime is 280103. The next prime is 280121. The reversal of 280104 is 401082.

It is a hoax number, since the sum of its digits (15) coincides with the sum of the digits of its distinct prime factors.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 280104.

It is not an unprimeable number, because it can be changed into a prime (280103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267 + ... + 794.

It is an arithmetic number, because the mean of its divisors is an integer number (23895).

2²⁸⁰¹⁰⁴ is an apocalyptic number.

280104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

280104 is an abundant number, since it is smaller than the sum of its proper divisors (484536).

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

280104 is a wasteful number, since it uses less digits than its factorization.

280104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1081 (or 1077 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 280104 is about 529.2485238525. The cubic root of 280104 is about 65.4294249844.

Adding to 280104 its reverse (401082), we get a palindrome (681186).

The spelling of 280104 in words is "two hundred eighty thousand, one hundred four".