489561408 has 196 divisors, whose sum is σ = 1665732000. Its totient is φ = 139781376.

The previous prime is 489561367. The next prime is 489561419. The reversal of 489561408 is 804165984.

489561408 is a `hidden beast` number, since 4 + 89 + 561 + 4 + 0 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 325843 + ... + 327341.

Almost surely, 2^489561408 is an apocalyptic number.

489561408 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 489561408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (832866000).

489561408 is an abundant number, since it is smaller than the sum of its proper divisors (1176170592).

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

489561408 is an equidigital number, since it uses as much as digits as its factorization.

489561408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536 (or 1511 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 489561408 is about 22126.0346198771. The cubic root of 489561408 is about 788.1382254707.

The spelling of 489561408 in words is "four hundred eighty-nine million, five hundred sixty-one thousand, four hundred eight".