491947008 has 88 divisors (see below), whose sum is σ = 1498600512. Its totient is φ = 140550144.

The previous prime is 491946991. The next prime is 491947009. The reversal of 491947008 is 800749194.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (491947009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10066 + ... + 32942.

Almost surely, 2^491947008 is an apocalyptic number.

491947008 is a gapful number since it is divisible by the number (48) 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 491947008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (749300256).

491947008 is an abundant number, since it is smaller than the sum of its proper divisors (1006653504).

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

491947008 is a wasteful number, since it uses less digits than its factorization.

491947008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22907 (or 22889 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 491947008 is about 22179.8784487201. The cubic root of 491947008 is about 789.4163332898.

The spelling of 491947008 in words is "four hundred ninety-one million, nine hundred forty-seven thousand, eight".