1389872338 has 4 divisors (see below), whose sum is σ = 2084808510. Its totient is φ = 694936168.

The previous prime is 1389872291. The next prime is 1389872347. The reversal of 1389872338 is 8332789831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8332789831 = 26189 ⋅318179.

It can be written as a sum of positive squares in only one way, i.e., 1161650889 + 228221449 = 34083^2 + 15107^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347468083 + ... + 347468086.

Almost surely, 2^1389872338 is an apocalyptic number.

1389872338 is a deficient number, since it is larger than the sum of its proper divisors (694936172).

1389872338 is an equidigital number, since it uses as much as digits as its factorization.

1389872338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694936171.

The product of its digits is 1741824, while the sum is 52.

The square root of 1389872338 is about 37280.9916445365. The cubic root of 1389872338 is about 1115.9848626347.

The spelling of 1389872338 in words is "one billion, three hundred eighty-nine million, eight hundred seventy-two thousand, three hundred thirty-eight".