491764608 has 80 divisors (see below), whose sum is σ = 1463514360. Its totient is φ = 163918080.

The previous prime is 491764607. The next prime is 491764613. The reversal of 491764608 is 806467194.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491764607) 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, 13348 + ... + 34083.

Almost surely, 2^491764608 is an apocalyptic number.

491764608 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

491764608 is an abundant number, since it is smaller than the sum of its proper divisors (971749752).

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

491764608 is an equidigital number, since it uses as much as digits as its factorization.

491764608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47457 (or 47436 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 491764608 is about 22175.7662325341. The cubic root of 491764608 is about 789.3187568325.

The spelling of 491764608 in words is "four hundred ninety-one million, seven hundred sixty-four thousand, six hundred eight".