491041408 has 128 divisors (see below), whose sum is σ = 1163534400. Its totient is φ = 203489280.

The previous prime is 491041373. The next prime is 491041429. The reversal of 491041408 is 804140194.

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

It is a super-2 number, since 2×491041408² = 482243328741244928, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 491041408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2544160 + ... + 2544352.

Almost surely, 2^491041408 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 491041408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (581767200).

491041408 is an abundant number, since it is smaller than the sum of its proper divisors (672492992).

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

491041408 is a wasteful number, since it uses less digits than its factorization.

491041408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370 (or 358 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 491041408 is about 22159.4541449017. The cubic root of 491041408 is about 788.9316370790.

The spelling of 491041408 in words is "four hundred ninety-one million, forty-one thousand, four hundred eight".