493681418 has 16 divisors (see below), whose sum is σ = 758181384. Its totient is φ = 241013760.

The previous prime is 493681387. The next prime is 493681421. The reversal of 493681418 is 814186394.

It can be written as a sum of positive squares in 4 ways, for example, as 133934329 + 359747089 = 11573^2 + 18967^2 .

It is an unprimeable number.

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, 1946 + ... + 31482.

Almost surely, 2^493681418 is an apocalyptic number.

493681418 is a deficient number, since it is larger than the sum of its proper divisors (264499966).

493681418 is a wasteful number, since it uses less digits than its factorization.

493681418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29737.

The product of its digits is 165888, while the sum is 44.

The square root of 493681418 is about 22218.9427741286. The cubic root of 493681418 is about 790.3429681052.

The spelling of 493681418 in words is "four hundred ninety-three million, six hundred eighty-one thousand, four hundred eighteen".