1138579738 has 4 divisors (see below), whose sum is σ = 1707869610. Its totient is φ = 569289868.

The previous prime is 1138579733. The next prime is 1138579763. The reversal of 1138579738 is 8379758311.

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., 1125132849 + 13446889 = 33543^2 + 3667^2 .

It is not an unprimeable number, because it can be changed into a prime (1138579733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 284644933 + ... + 284644936.

Almost surely, 2^1138579738 is an apocalyptic number.

1138579738 is a deficient number, since it is larger than the sum of its proper divisors (569289872).

1138579738 is an equidigital number, since it uses as much as digits as its factorization.

1138579738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569289871.

The product of its digits is 1270080, while the sum is 52.

The square root of 1138579738 is about 33742.8472124093. The cubic root of 1138579738 is about 1044.2099254658.

The spelling of 1138579738 in words is "one billion, one hundred thirty-eight million, five hundred seventy-nine thousand, seven hundred thirty-eight".