1389468128 has 12 divisors (see below), whose sum is σ = 2735515440. Its totient is φ = 694734048.

The previous prime is 1389468079. The next prime is 1389468139. The reversal of 1389468128 is 8218649831.

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, 21710408 + ... + 21710471.

It is an arithmetic number, because the mean of its divisors is an integer number (227959620).

Almost surely, 2^1389468128 is an apocalyptic number.

It is an amenable number.

1389468128 is a deficient number, since it is larger than the sum of its proper divisors (1346047312).

1389468128 is an equidigital number, since it uses as much as digits as its factorization.

1389468128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43420889 (or 43420881 counting only the distinct ones).

The product of its digits is 663552, while the sum is 50.

The square root of 1389468128 is about 37275.5701230712. The cubic root of 1389468128 is about 1115.8766666118.

The spelling of 1389468128 in words is "one billion, three hundred eighty-nine million, four hundred sixty-eight thousand, one hundred twenty-eight".