280497 has 24 divisors (see below), whose sum is σ = 463296. Its totient is φ = 147744.

The previous prime is 280487. The next prime is 280499. The reversal of 280497 is 794082.

It is not a de Polignac number, because 280497 - 2¹² = 276401 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

280497 is an undulating number in base 11.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 7563 + ... + 7599.

It is an arithmetic number, because the mean of its divisors is an integer number (19304).

2²⁸⁰⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

280497 is a deficient number, since it is larger than the sum of its proper divisors (182799).

280497 is a wasteful number, since it uses less digits than its factorization.

280497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 280497 is about 529.6196748611. The cubic root of 280497 is about 65.4600109423.

It can be divided in two parts, 280 and 497, that added together give a palindrome (777).

The spelling of 280497 in words is "two hundred eighty thousand, four hundred ninety-seven".