491167824 has 40 divisors (see below), whose sum is σ = 1450115520. Its totient is φ = 140333568.

The previous prime is 491167819. The next prime is 491167849. The reversal of 491167824 is 428761194.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 730569 + ... + 731240.

It is an arithmetic number, because the mean of its divisors is an integer number (36252888).

Almost surely, 2^491167824 is an apocalyptic number.

It is an amenable number.

491167824 is an abundant number, since it is smaller than the sum of its proper divisors (958947696).

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

491167824 is a wasteful number, since it uses less digits than its factorization.

491167824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461827 (or 1461821 counting only the distinct ones).

The product of its digits is 96768, while the sum is 42.

The square root of 491167824 is about 22162.3063781728. The cubic root of 491167824 is about 788.9993333553. Note that the first 3 decimals are identical.

The spelling of 491167824 in words is "four hundred ninety-one million, one hundred sixty-seven thousand, eight hundred twenty-four".