491646528 has 336 divisors, whose sum is σ = 1626168960. Its totient is φ = 141115392.

The previous prime is 491646523. The next prime is 491646559. The reversal of 491646528 is 825646194.

It is not an unprimeable number, because it can be changed into a prime (491646521) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8332963 + ... + 8333021.

Almost surely, 2^491646528 is an apocalyptic number.

491646528 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 491646528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (813084480).

491646528 is an abundant number, since it is smaller than the sum of its proper divisors (1134522432).

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

491646528 is a wasteful number, since it uses less digits than its factorization.

491646528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 141 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 491646528 is about 22173.1037069689. The cubic root of 491646528 is about 789.2555760491.

The spelling of 491646528 in words is "four hundred ninety-one million, six hundred forty-six thousand, five hundred twenty-eight".