849658138 has 12 divisors (see below), whose sum is σ = 1482566922. Its totient is φ = 364139160.

The previous prime is 849658127. The next prime is 849658163. The reversal of 849658138 is 831856948.

It can be written as a sum of positive squares in only one way, i.e., 808094329 + 41563809 = 28427^2 + 6447^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4334893 + ... + 4335088.

Almost surely, 2^849658138 is an apocalyptic number.

849658138 is a deficient number, since it is larger than the sum of its proper divisors (632908784).

849658138 is a wasteful number, since it uses less digits than its factorization.

849658138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8669997 (or 8669990 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 52.

The square root of 849658138 is about 29148.8959996772. The cubic root of 849658138 is about 947.1412260336.

The spelling of 849658138 in words is "eight hundred forty-nine million, six hundred fifty-eight thousand, one hundred thirty-eight".