489378640 has 40 divisors (see below), whose sum is σ = 1140328800. Its totient is φ = 195317376.

The previous prime is 489378623. The next prime is 489378689. The reversal of 489378640 is 46873984.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30811 + ... + 43909.

It is an arithmetic number, because the mean of its divisors is an integer number (28508220).

Almost surely, 2^489378640 is an apocalyptic number.

489378640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

489378640 is an abundant number, since it is smaller than the sum of its proper divisors (650950160).

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

489378640 is a wasteful number, since it uses less digits than its factorization.

489378640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13579 (or 13573 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 49.

The square root of 489378640 is about 22121.9040771811. The cubic root of 489378640 is about 788.0401346939.

The spelling of 489378640 in words is "four hundred eighty-nine million, three hundred seventy-eight thousand, six hundred forty".