280504 has 16 divisors (see below), whose sum is σ = 601200. Its totient is φ = 120192.

The previous prime is 280499. The next prime is 280507. The reversal of 280504 is 405082.

It is a happy number.

280504 is a modest number, since divided by 504 gives 280 as remainder.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280507) 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, 2449 + ... + 2560.

It is an arithmetic number, because the mean of its divisors is an integer number (37575).

2²⁸⁰⁵⁰⁴ is an apocalyptic number.

It is an amenable number.

280504 is an abundant number, since it is smaller than the sum of its proper divisors (320696).

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

280504 is a wasteful number, since it uses less digits than its factorization.

280504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5022 (or 5018 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 280504 is about 529.6262833357. The cubic root of 280504 is about 65.4605554713.

Adding to 280504 its reverse (405082), we get a palindrome (685586).

It can be divided in two parts, 280 and 504, that added together give a square (784 = 28²).

The spelling of 280504 in words is "two hundred eighty thousand, five hundred four".