491323968 has 70 divisors (see below), whose sum is σ = 1456453526. Its totient is φ = 163772928.

The previous prime is 491323961. The next prime is 491323981. The reversal of 491323968 is 869323194.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 339738624 + 151585344 = 18432^2 + 12312^2 .

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (491323961) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 42205 + ... + 52572.

Almost surely, 2^491323968 is an apocalyptic number.

491323968 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

491323968 is an abundant number, since it is smaller than the sum of its proper divisors (965129558).

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

491323968 is an equidigital number, since it uses as much as digits as its factorization.

491323968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94801 (or 94782 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 491323968 is about 22165.8288362966. The cubic root of 491323968 is about 789.0829330627.

The spelling of 491323968 in words is "four hundred ninety-one million, three hundred twenty-three thousand, nine hundred sixty-eight".