489894038638 has 8 divisors (see below), whose sum is σ = 734844699288. Its totient is φ = 244945805544.

The previous prime is 489894038597. The next prime is 489894038657. The reversal of 489894038638 is 836830498984.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32245 + ... + 990367.

It is an arithmetic number, because the mean of its divisors is an integer number (91855587411).

Almost surely, 2^489894038638 is an apocalyptic number.

489894038638 is a deficient number, since it is larger than the sum of its proper divisors (244950660650).

489894038638 is a wasteful number, since it uses less digits than its factorization.

489894038638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213778.

The product of its (nonzero) digits is 286654464, while the sum is 70.

The spelling of 489894038638 in words is "four hundred eighty-nine billion, eight hundred ninety-four million, thirty-eight thousand, six hundred thirty-eight".