491954680 has 64 divisors (see below), whose sum is σ = 1267462080. Its totient is φ = 168345600.

The previous prime is 491954657. The next prime is 491954711. The reversal of 491954680 is 86459194.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 491954680.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178110 + ... + 180850.

It is an arithmetic number, because the mean of its divisors is an integer number (19804095).

Almost surely, 2^491954680 is an apocalyptic number.

491954680 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 491954680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (633731040).

491954680 is an abundant number, since it is smaller than the sum of its proper divisors (775507400).

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

491954680 is a wasteful number, since it uses less digits than its factorization.

491954680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3400 (or 3396 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 491954680 is about 22180.0513975960. The cubic root of 491954680 is about 789.4204369639.

The spelling of 491954680 in words is "four hundred ninety-one million, nine hundred fifty-four thousand, six hundred eighty".