489212640 has 144 divisors (see below), whose sum is σ = 1907968608. Its totient is φ = 111817728.

The previous prime is 489212623. The next prime is 489212651. The reversal of 489212640 is 46212984.

489212640 is a `hidden beast` number, since 4 + 8 + 9 + 2 + 1 + 2 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 489212595 and 489212604.

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 23 ways as a sum of consecutive naturals, for example, 14187 + ... + 34346.

It is an arithmetic number, because the mean of its divisors is an integer number (13249782).

Almost surely, 2^489212640 is an apocalyptic number.

489212640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

489212640 is an abundant number, since it is smaller than the sum of its proper divisors (1418755968).

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

489212640 is a wasteful number, since it uses less digits than its factorization.

489212640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48561 (or 48550 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 489212640 is about 22118.1518215243. The cubic root of 489212640 is about 787.9510220617.

The spelling of 489212640 in words is "four hundred eighty-nine million, two hundred twelve thousand, six hundred forty".