491626368 has 128 divisors (see below), whose sum is σ = 1527552000. Its totient is φ = 155229696.

The previous prime is 491626339. The next prime is 491626381. The reversal of 491626368 is 863626194.

491626368 is a `hidden beast` number, since 4 + 9 + 1 + 6 + 2 + 636 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61921 + ... + 69407.

It is an arithmetic number, because the mean of its divisors is an integer number (11934000).

Almost surely, 2^491626368 is an apocalyptic number.

491626368 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 491626368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (763776000).

491626368 is an abundant number, since it is smaller than the sum of its proper divisors (1035925632).

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

491626368 is a wasteful number, since it uses less digits than its factorization.

491626368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7529 (or 7511 counting only the distinct ones).

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

The square root of 491626368 is about 22172.6490974804. The cubic root of 491626368 is about 789.2447880751.

The spelling of 491626368 in words is "four hundred ninety-one million, six hundred twenty-six thousand, three hundred sixty-eight".