491641460 has 24 divisors (see below), whose sum is σ = 1042100640. Its totient is φ = 194817824.

The previous prime is 491641441. The next prime is 491641463. The reversal of 491641460 is 64146194.

It is a happy number.

It is a super-2 number, since 2×491641460² = 483422650381863200, 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 491641460.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491641463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112730 + ... + 117009.

It is an arithmetic number, because the mean of its divisors is an integer number (43420860).

Almost surely, 2^491641460 is an apocalyptic number.

It is an amenable number.

491641460 is an abundant number, since it is smaller than the sum of its proper divisors (550459180).

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

491641460 is a wasteful number, since it uses less digits than its factorization.

491641460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229855 (or 229853 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 491641460 is about 22172.9894240718. The cubic root of 491641460 is about 789.2528641000.

The spelling of 491641460 in words is "four hundred ninety-one million, six hundred forty-one thousand, four hundred sixty".