280826 has 16 divisors (see below), whose sum is σ = 518784. Its totient is φ = 111024.

The previous prime is 280817. The next prime is 280837. The reversal of 280826 is 628082.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a zygodrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 280795 and 280804.

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, 590 + ... + 953.

It is an arithmetic number, because the mean of its divisors is an integer number (32424).

2²⁸⁰⁸²⁶ is an apocalyptic number.

280826 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

280826 is a deficient number, since it is larger than the sum of its proper divisors (237958).

280826 is a wasteful number, since it uses less digits than its factorization.

280826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 280826 is about 529.9301840809. The cubic root of 280826 is about 65.4855940192.

280826 divided by its sum of digits (26) gives a palindrome (10801).

The spelling of 280826 in words is "two hundred eighty thousand, eight hundred twenty-six".