280323873 has 12 divisors (see below), whose sum is σ = 408844800. Its totient is φ = 185067576.

The previous prime is 280323859. The next prime is 280323881. The reversal of 280323873 is 378323082.

It is not a de Polignac number, because 280323873 - 2¹⁰ = 280322849 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (280323073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 150273 + ... + 152126.

It is an arithmetic number, because the mean of its divisors is an integer number (34070400).

Almost surely, 2^280323873 is an apocalyptic number.

It is an amenable number.

280323873 is a deficient number, since it is larger than the sum of its proper divisors (128520927).

280323873 is a wasteful number, since it uses less digits than its factorization.

280323873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302508 (or 302505 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 280323873 is about 16742.8752907020. The cubic root of 280323873 is about 654.4654053358.

The spelling of 280323873 in words is "two hundred eighty million, three hundred twenty-three thousand, eight hundred seventy-three".