1389696456728 has 8 divisors (see below), whose sum is σ = 2605680856380. Its totient is φ = 694848228360.

The previous prime is 1389696456719. The next prime is 1389696456751. The reversal of 1389696456728 is 8276546969831.

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, 86856028538 + ... + 86856028553.

Almost surely, 2^{1389696456728} is an apocalyptic number.

It is an amenable number.

1389696456728 is a deficient number, since it is larger than the sum of its proper divisors (1215984399652).

1389696456728 is a wasteful number, since it uses less digits than its factorization.

1389696456728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173712057097 (or 173712057093 counting only the distinct ones).

The product of its digits is 940584960, while the sum is 74.

The spelling of 1389696456728 in words is "one trillion, three hundred eighty-nine billion, six hundred ninety-six million, four hundred fifty-six thousand, seven hundred twenty-eight".