1338831218 has 4 divisors (see below), whose sum is σ = 2008246830. Its totient is φ = 669415608.

The previous prime is 1338831217. The next prime is 1338831223. The reversal of 1338831218 is 8121388331.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 681575449 + 657255769 = 26107^2 + 25637^2 .

It is not an unprimeable number, because it can be changed into a prime (1338831211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334707803 + ... + 334707806.

Almost surely, 2^1338831218 is an apocalyptic number.

1338831218 is a deficient number, since it is larger than the sum of its proper divisors (669415612).

1338831218 is an equidigital number, since it uses as much as digits as its factorization.

1338831218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669415611.

The product of its digits is 27648, while the sum is 38.

The square root of 1338831218 is about 36590.0426072449. The cubic root of 1338831218 is about 1102.1531430127.

The spelling of 1338831218 in words is "one billion, three hundred thirty-eight million, eight hundred thirty-one thousand, two hundred eighteen".