1389239608 has 8 divisors (see below), whose sum is σ = 2604824280. Its totient is φ = 694619800.

The previous prime is 1389239597. The next prime is 1389239623. The reversal of 1389239608 is 8069329831.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86827468 + ... + 86827483.

It is an arithmetic number, because the mean of its divisors is an integer number (325603035).

Almost surely, 2^1389239608 is an apocalyptic number.

It is an amenable number.

1389239608 is a deficient number, since it is larger than the sum of its proper divisors (1215584672).

1389239608 is a wasteful number, since it uses less digits than its factorization.

1389239608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173654957 (or 173654953 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 49.

The square root of 1389239608 is about 37272.5047186260. The cubic root of 1389239608 is about 1115.8154887382.

The spelling of 1389239608 in words is "one billion, three hundred eighty-nine million, two hundred thirty-nine thousand, six hundred eight".