285840273 has 8 divisors (see below), whose sum is σ = 381636288. Its totient is φ = 190302224.

The previous prime is 285840263. The next prime is 285840287. The reversal of 285840273 is 372048582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 285840273 - 2⁴ = 285840257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (285840253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61890 + ... + 66347.

It is an arithmetic number, because the mean of its divisors is an integer number (47704536).

Almost surely, 2^285840273 is an apocalyptic number.

It is an amenable number.

285840273 is a deficient number, since it is larger than the sum of its proper divisors (95796015).

285840273 is a wasteful number, since it uses less digits than its factorization.

285840273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128983.

The product of its (nonzero) digits is 107520, while the sum is 39.

The square root of 285840273 is about 16906.8114379974. The cubic root of 285840273 is about 658.7305511747.

The spelling of 285840273 in words is "two hundred eighty-five million, eight hundred forty thousand, two hundred seventy-three".