491356320 has 288 divisors, whose sum is σ = 1940174208. Its totient is φ = 103606272.

The previous prime is 491356303. The next prime is 491356339. The reversal of 491356320 is 23653194.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 304957 + ... + 306563.

It is an arithmetic number, because the mean of its divisors is an integer number (6736716).

Almost surely, 2^491356320 is an apocalyptic number.

491356320 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 491356320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (970087104).

491356320 is an abundant number, since it is smaller than the sum of its proper divisors (1448817888).

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

491356320 is a wasteful number, since it uses less digits than its factorization.

491356320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652 (or 1637 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 491356320 is about 22166.5585962278. The cubic root of 491356320 is about 789.1002521519.

It can be divided in two parts, 49135 and 6320, that added together give a palindrome (55455).

The spelling of 491356320 in words is "four hundred ninety-one million, three hundred fifty-six thousand, three hundred twenty".