491333120 has 80 divisors (see below), whose sum is σ = 1198383120. Its totient is φ = 193142784.

The previous prime is 491333081. The next prime is 491333173. The reversal of 491333120 is 21333194.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 491333120.

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, 149414 + ... + 152666.

It is an arithmetic number, because the mean of its divisors is an integer number (14979789).

Almost surely, 2^491333120 is an apocalyptic number.

491333120 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 491333120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (599191560).

491333120 is an abundant number, since it is smaller than the sum of its proper divisors (707050000).

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

491333120 is an equidigital number, since it uses as much as digits as its factorization.

491333120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3335 (or 3319 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 491333120 is about 22166.0352792284. The cubic root of 491333120 is about 789.0878325063.

The spelling of 491333120 in words is "four hundred ninety-one million, three hundred thirty-three thousand, one hundred twenty".