491041000 has 32 divisors (see below), whose sum is σ = 1149038280. Its totient is φ = 196416000.

The previous prime is 491040989. The next prime is 491041009. The reversal of 491041000 is 140194.

It can be written as a sum of positive squares in 4 ways, for example, as 15888196 + 475152804 = 3986^2 + 21798^2 .

It is a super-2 number, since 2×491041000² = 482242527362000000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (491041009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244521 + ... + 246520.

Almost surely, 2^491041000 is an apocalyptic number.

491041000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

491041000 is an abundant number, since it is smaller than the sum of its proper divisors (657997280).

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

491041000 is a wasteful number, since it uses less digits than its factorization.

491041000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491062 (or 491048 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 491041000 is about 22159.4449388968. Note that the first 3 decimals coincide. The cubic root of 491041000 is about 788.9314185746.

Adding to 491041000 its reverse (140194), we get a palindrome (491181194).

The spelling of 491041000 in words is "four hundred ninety-one million, forty-one thousand".