285748838 has 4 divisors (see below), whose sum is σ = 428623260. Its totient is φ = 142874418.

The previous prime is 285748789. The next prime is 285748843. The reversal of 285748838 is 838847582.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 285748838.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 71437208 + ... + 71437211.

It is an arithmetic number, because the mean of its divisors is an integer number (107155815).

Almost surely, 2^285748838 is an apocalyptic number.

285748838 is a deficient number, since it is larger than the sum of its proper divisors (142874422).

285748838 is a wasteful number, since it uses less digits than its factorization.

285748838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142874421.

The product of its digits is 3440640, while the sum is 53.

The square root of 285748838 is about 16904.1071340666. The cubic root of 285748838 is about 658.6603051235.

The spelling of 285748838 in words is "two hundred eighty-five million, seven hundred forty-eight thousand, eight hundred thirty-eight".