1138738318 has 16 divisors (see below), whose sum is σ = 1726058880. Its totient is φ = 563412600.

The previous prime is 1138738313. The next prime is 1138738327. The reversal of 1138738318 is 8138378311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138738313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79873 + ... + 93043.

It is an arithmetic number, because the mean of its divisors is an integer number (107878680).

Almost surely, 2^1138738318 is an apocalyptic number.

1138738318 is a deficient number, since it is larger than the sum of its proper divisors (587320562).

1138738318 is a wasteful number, since it uses less digits than its factorization.

1138738318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13623.

The product of its digits is 96768, while the sum is 43.

The square root of 1138738318 is about 33745.1969619382. The cubic root of 1138738318 is about 1044.2584019778.

The spelling of 1138738318 in words is "one billion, one hundred thirty-eight million, seven hundred thirty-eight thousand, three hundred eighteen".