489978444 has 12 divisors (see below), whose sum is σ = 1143283064. Its totient is φ = 163326144.

The previous prime is 489978443. The next prime is 489978449. The reversal of 489978444 is 444879984.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×489978444² = 480157751169322272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (489978443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20415757 + ... + 20415780.

Almost surely, 2^489978444 is an apocalyptic number.

It is an amenable number.

489978444 is an abundant number, since it is smaller than the sum of its proper divisors (653304620).

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

489978444 is a wasteful number, since it uses less digits than its factorization.

489978444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40831544 (or 40831542 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 57.

The square root of 489978444 is about 22135.4567154148. The cubic root of 489978444 is about 788.3619554747.

The spelling of 489978444 in words is "four hundred eighty-nine million, nine hundred seventy-eight thousand, four hundred forty-four".