1138438306 has 8 divisors (see below), whose sum is σ = 1707816384. Its totient is φ = 569166180.

The previous prime is 1138438289. The next prime is 1138438307. The reversal of 1138438306 is 6038348311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1138438307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10971 + ... + 48961.

It is an arithmetic number, because the mean of its divisors is an integer number (213477048).

Almost surely, 2^1138438306 is an apocalyptic number.

1138438306 is a deficient number, since it is larger than the sum of its proper divisors (569378078).

1138438306 is a wasteful number, since it uses less digits than its factorization.

1138438306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52976.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 1138438306 is about 33740.7514142765. The cubic root of 1138438306 is about 1044.1666871492.

The spelling of 1138438306 in words is "one billion, one hundred thirty-eight million, four hundred thirty-eight thousand, three hundred six".