285999979 has 8 divisors (see below), whose sum is σ = 289364400. Its totient is φ = 282648576.

The previous prime is 285999971. The next prime is 286000021. The reversal of 285999979 is 979999582.

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 285999979 - 2³ = 285999971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285999971) 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, 45067 + ... + 51019.

It is an arithmetic number, because the mean of its divisors is an integer number (36170550).

Almost surely, 2^285999979 is an apocalyptic number.

285999979 is a deficient number, since it is larger than the sum of its proper divisors (3364421).

285999979 is a wasteful number, since it uses less digits than its factorization.

285999979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6509.

The product of its digits is 33067440, while the sum is 67.

The square root of 285999979 is about 16911.5339044097. The cubic root of 285999979 is about 658.8532113270.

The spelling of 285999979 in words is "two hundred eighty-five million, nine hundred ninety-nine thousand, nine hundred seventy-nine".