491536320 has 224 divisors, whose sum is σ = 1724924160. Its totient is φ = 117596160.

The previous prime is 491536319. The next prime is 491536333. The reversal of 491536320 is 23635194.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 939579 + ... + 940101.

Almost surely, 2^491536320 is an apocalyptic number.

491536320 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 491536320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (862462080).

491536320 is an abundant number, since it is smaller than the sum of its proper divisors (1233387840).

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

491536320 is a wasteful number, since it uses less digits than its factorization.

491536320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643 (or 633 counting only the distinct ones).

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

The square root of 491536320 is about 22170.6183946231. The cubic root of 491536320 is about 789.1965981902.

The spelling of 491536320 in words is "four hundred ninety-one million, five hundred thirty-six thousand, three hundred twenty".