284638990 has 24 divisors (see below), whose sum is σ = 544266792. Its totient is φ = 107157120.

The previous prime is 284638987. The next prime is 284639101. The reversal of 284638990 is 99836482.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 46356 + ... + 52135.

It is an arithmetic number, because the mean of its divisors is an integer number (22677783).

Almost surely, 2^284638990 is an apocalyptic number.

284638990 is a deficient number, since it is larger than the sum of its proper divisors (259627802).

284638990 is a wasteful number, since it uses less digits than its factorization.

284638990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98532 (or 98515 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 49.

The square root of 284638990 is about 16871.2474346149. The cubic root of 284638990 is about 657.8064535471.

The spelling of 284638990 in words is "two hundred eighty-four million, six hundred thirty-eight thousand, nine hundred ninety".