491669424 has 120 divisors (see below), whose sum is σ = 1438574592. Its totient is φ = 156574080.

The previous prime is 491669419. The next prime is 491669443. The reversal of 491669424 is 424966194.

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

It is a self number, because there is not a number n which added to its sum of digits gives 491669424.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 369849 + ... + 371175.

Almost surely, 2^491669424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491669424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (719287296).

491669424 is an abundant number, since it is smaller than the sum of its proper divisors (946905168).

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

491669424 is a wasteful number, since it uses less digits than its factorization.

491669424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1455 (or 1446 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 491669424 is about 22173.6200021557. The cubic root of 491669424 is about 789.2678277476.

The spelling of 491669424 in words is "four hundred ninety-one million, six hundred sixty-nine thousand, four hundred twenty-four".