284685138 has 32 divisors (see below), whose sum is σ = 634259520. Its totient is φ = 94651200.

The previous prime is 284685119. The next prime is 284685161. The reversal of 284685138 is 831586482.

It is a junction number, because it is equal to n+sod(n) for n = 284685093 and 284685102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15081 + ... + 28227.

It is an arithmetic number, because the mean of its divisors is an integer number (19820610).

Almost surely, 2^284685138 is an apocalyptic number.

284685138 is an abundant number, since it is smaller than the sum of its proper divisors (349574382).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

284685138 is a wasteful number, since it uses less digits than its factorization.

284685138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13559 (or 13553 counting only the distinct ones).

The product of its digits is 368640, while the sum is 45.

The square root of 284685138 is about 16872.6150314644. The cubic root of 284685138 is about 657.8420012794.

The spelling of 284685138 in words is "two hundred eighty-four million, six hundred eighty-five thousand, one hundred thirty-eight".