285997823 has 8 divisors (see below), whose sum is σ = 302037120. Its totient is φ = 270057240.

The previous prime is 285997793. The next prime is 285997849. The reversal of 285997823 is 328799582.

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 285997823 - 2¹² = 285993727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285997853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18683 + ... + 30348.

It is an arithmetic number, because the mean of its divisors is an integer number (37754640).

Almost surely, 2^285997823 is an apocalyptic number.

285997823 is a deficient number, since it is larger than the sum of its proper divisors (16039297).

285997823 is a wasteful number, since it uses less digits than its factorization.

285997823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49357.

The product of its digits is 2177280, while the sum is 53.

The square root of 285997823 is about 16911.4701608110. The cubic root of 285997823 is about 658.8515557429.

The spelling of 285997823 in words is "two hundred eighty-five million, nine hundred ninety-seven thousand, eight hundred twenty-three".