489561644 has 72 divisors (see below), whose sum is σ = 1049497680. Its totient is φ = 198253440.

The previous prime is 489561637. The next prime is 489561649. The reversal of 489561644 is 446165984.

It is a happy number.

It is a super-3 number, since 3×489561644³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (489561649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 181127 + ... + 183809.

Almost surely, 2^489561644 is an apocalyptic number.

489561644 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

489561644 is an abundant number, since it is smaller than the sum of its proper divisors (559936036).

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

489561644 is a wasteful number, since it uses less digits than its factorization.

489561644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2751 (or 2738 counting only the distinct ones).

The product of its digits is 829440, while the sum is 47.

The square root of 489561644 is about 22126.0399529604. The cubic root of 489561644 is about 788.1383521151.

The spelling of 489561644 in words is "four hundred eighty-nine million, five hundred sixty-one thousand, six hundred forty-four".