280490 has 16 divisors (see below), whose sum is σ = 577152. Its totient is φ = 96144.

The previous prime is 280487. The next prime is 280499. The reversal of 280490 is 94082.

It is a plaindrome in base 16.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (280499) 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, 1934 + ... + 2073.

It is an arithmetic number, because the mean of its divisors is an integer number (36072).

2²⁸⁰⁴⁹⁰ is an apocalyptic number.

280490 is an abundant number, since it is smaller than the sum of its proper divisors (296662).

It is a weird number, because it is abundant, but not a pseudoperfect number.

280490 is a wasteful number, since it uses less digits than its factorization.

280490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4021.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 280490 is about 529.6130663041. The cubic root of 280490 is about 65.4594664043.

The spelling of 280490 in words is "two hundred eighty thousand, four hundred ninety".