938218138 has 32 divisors (see below), whose sum is σ = 1740392640. Its totient is φ = 372936960.

The previous prime is 938218133. The next prime is 938218147. The reversal of 938218138 is 831812839.

It is a junction number, because it is equal to n+sod(n) for n = 938218094 and 938218103.

It is not an unprimeable number, because it can be changed into a prime (938218133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80895 + ... + 91762.

It is an arithmetic number, because the mean of its divisors is an integer number (54387270).

Almost surely, 2^938218138 is an apocalyptic number.

938218138 is a deficient number, since it is larger than the sum of its proper divisors (802174502).

938218138 is a wasteful number, since it uses less digits than its factorization.

938218138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172702.

The product of its digits is 82944, while the sum is 43.

The square root of 938218138 is about 30630.3466842933. The cubic root of 938218138 is about 978.9667500844.

The spelling of 938218138 in words is "nine hundred thirty-eight million, two hundred eighteen thousand, one hundred thirty-eight".