493721568 has 72 divisors (see below), whose sum is σ = 1456044408. Its totient is φ = 164571264.

The previous prime is 493721567. The next prime is 493721581. The reversal of 493721568 is 865127394.

493721568 is a `hidden beast` number, since 493 + 7 + 2 + 156 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (493721567) 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 11 ways as a sum of consecutive naturals, for example, 23971 + ... + 39522.

It is an arithmetic number, because the mean of its divisors is an integer number (20222839).

Almost surely, 2^493721568 is an apocalyptic number.

493721568 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

493721568 is an abundant number, since it is smaller than the sum of its proper divisors (962322840).

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

493721568 is an equidigital number, since it uses as much as digits as its factorization.

493721568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63518 (or 63498 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 493721568 is about 22219.8462640946. The cubic root of 493721568 is about 790.3643931301.

The spelling of 493721568 in words is "four hundred ninety-three million, seven hundred twenty-one thousand, five hundred sixty-eight".