489739920 has 80 divisors (see below), whose sum is σ = 1584220032. Its totient is φ = 124917760.

The previous prime is 489739879. The next prime is 489739931. The reversal of 489739920 is 29937984.

It is a tau number, because it is divible by the number of its divisors (80).

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 15 ways as a sum of consecutive naturals, for example, 38841 + ... + 49880.

Almost surely, 2^489739920 is an apocalyptic number.

489739920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

489739920 is an abundant number, since it is smaller than the sum of its proper divisors (1094480112).

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

489739920 is a wasteful number, since it uses less digits than its factorization.

489739920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88760 (or 88754 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 51.

The square root of 489739920 is about 22130.0682330625. The cubic root of 489739920 is about 788.2340085067.

The spelling of 489739920 in words is "four hundred eighty-nine million, seven hundred thirty-nine thousand, nine hundred twenty".