1388999338 has 8 divisors (see below), whose sum is σ = 2084473188. Its totient is φ = 694174944.

The previous prime is 1388999327. The next prime is 1388999377. The reversal of 1388999338 is 8339998831.

It can be written as a sum of positive squares in 2 ways, for example, as 1195983889 + 193015449 = 34583^2 + 13893^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156981 + ... + 165592.

Almost surely, 2^1388999338 is an apocalyptic number.

1388999338 is a deficient number, since it is larger than the sum of its proper divisors (695473850).

1388999338 is a wasteful number, since it uses less digits than its factorization.

1388999338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324728.

The product of its digits is 10077696, while the sum is 61.

The square root of 1388999338 is about 37269.2814258606. The cubic root of 1388999338 is about 1115.7511579961.

The spelling of 1388999338 in words is "one billion, three hundred eighty-eight million, nine hundred ninety-nine thousand, three hundred thirty-eight".