280066385 has 16 divisors (see below), whose sum is σ = 338757120. Its totient is φ = 222277440.

The previous prime is 280066349. The next prime is 280066393. The reversal of 280066385 is 583660082.

It is not a de Polignac number, because 280066385 - 2⁶ = 280066321 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 604664 + ... + 605126.

It is an arithmetic number, because the mean of its divisors is an integer number (21172320).

Almost surely, 2^280066385 is an apocalyptic number.

It is an amenable number.

280066385 is a deficient number, since it is larger than the sum of its proper divisors (58690735).

280066385 is a wasteful number, since it uses less digits than its factorization.

280066385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1168.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 280066385 is about 16735.1840444018. The cubic root of 280066385 is about 654.2649602706.

The spelling of 280066385 in words is "two hundred eighty million, sixty-six thousand, three hundred eighty-five".