493836638 has 32 divisors (see below), whose sum is σ = 829751040. Its totient is φ = 219058560.

The previous prime is 493836613. The next prime is 493836647. The reversal of 493836638 is 836638394.

It is a super-2 number, since 2×493836638² = 487749250062286088, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134495 + ... + 138117.

It is an arithmetic number, because the mean of its divisors is an integer number (25929720).

Almost surely, 2^493836638 is an apocalyptic number.

493836638 is a deficient number, since it is larger than the sum of its proper divisors (335914402).

493836638 is a wasteful number, since it uses less digits than its factorization.

493836638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3872.

The product of its digits is 2239488, while the sum is 50.

The square root of 493836638 is about 22222.4354650880. The cubic root of 493836638 is about 790.4257908705.

The spelling of 493836638 in words is "four hundred ninety-three million, eight hundred thirty-six thousand, six hundred thirty-eight".