280816875 has 90 divisors (see below), whose sum is σ = 538149612. Its totient is φ = 146286000.

The previous prime is 280816849. The next prime is 280816909. The reversal of 280816875 is 578618082.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 280816875 - 2¹⁵ = 280784107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 280816875.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 6530604 + ... + 6530646.

Almost surely, 2^280816875 is an apocalyptic number.

280816875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

280816875 is a deficient number, since it is larger than the sum of its proper divisors (257332737).

280816875 is an frugal number, since it uses more digits than its factorization.

280816875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121 (or 51 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 45.

The square root of 280816875 is about 16757.5915632289. The cubic root of 280816875 is about 654.8488472768.

It can be divided in two parts, 2808 and 16875, that added together give a 9-th power (19683 = 3⁹).

The spelling of 280816875 in words is "two hundred eighty million, eight hundred sixteen thousand, eight hundred seventy-five".