493852138 has 12 divisors (see below), whose sum is σ = 802144998. Its totient is φ = 227931600.

The previous prime is 493852133. The next prime is 493852141. The reversal of 493852138 is 831258394.

It can be written as a sum of positive squares in 3 ways, for example, as 81234169 + 412617969 = 9013^2 + 20313^2 .

It is a junction number, because it is equal to n+sod(n) for n = 493852094 and 493852103.

It is not an unprimeable number, because it can be changed into a prime (493852133) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 730213 + ... + 730888.

Almost surely, 2^493852138 is an apocalyptic number.

493852138 is a deficient number, since it is larger than the sum of its proper divisors (308292860).

493852138 is a wasteful number, since it uses less digits than its factorization.

493852138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461129 (or 1461116 counting only the distinct ones).

The product of its digits is 207360, while the sum is 43.

The square root of 493852138 is about 22222.7842090050. The cubic root of 493852138 is about 790.4340604551.

The spelling of 493852138 in words is "four hundred ninety-three million, eight hundred fifty-two thousand, one hundred thirty-eight".