491384120 has 64 divisors (see below), whose sum is σ = 1151820000. Its totient is φ = 188435968.

The previous prime is 491384083. The next prime is 491384123. The reversal of 491384120 is 21483194.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491384123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171419 + ... + 174261.

Almost surely, 2^491384120 is an apocalyptic number.

491384120 is a gapful number since it is divisible by the number (40) 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 491384120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (575910000).

491384120 is an abundant number, since it is smaller than the sum of its proper divisors (660435880).

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

491384120 is a wasteful number, since it uses less digits than its factorization.

491384120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3032 (or 3028 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 491384120 is about 22167.1856580848. The cubic root of 491384120 is about 789.1151337984.

The spelling of 491384120 in words is "four hundred ninety-one million, three hundred eighty-four thousand, one hundred twenty".