489386991844 has 27 divisors (see below), whose sum is σ = 864625887867. Its totient is φ = 242373048768.

The previous prime is 489386991823. The next prime is 489386991851. The reversal of 489386991844 is 448199683984.

The square root of 489386991844 is 699562.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 33869985444 + 455517006400 = 184038^2 + 674920^2 .

It is a super-2 number, since 2×489386991844² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 152502912 + ... + 152506120.

Almost surely, 2^489386991844 is an apocalyptic number.

489386991844 is the 699562-nd square number.

It is an amenable number.

489386991844 is a deficient number, since it is larger than the sum of its proper divisors (375238896023).

489386991844 is an frugal number, since it uses more digits than its factorization.

489386991844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6640 (or 3320 counting only the distinct ones).

The product of its digits is 429981696, while the sum is 73.

The spelling of 489386991844 in words is "four hundred eighty-nine billion, three hundred eighty-six million, nine hundred ninety-one thousand, eight hundred forty-four".