1384688128 has 20 divisors (see below), whose sum is σ = 2766672810. Its totient is φ = 692343808.

The previous prime is 1384688119. The next prime is 1384688171. The reversal of 1384688128 is 8218864831.

It can be written as a sum of positive squares in only one way, i.e., 1299458304 + 85229824 = 36048^2 + 9232^2 .

It is a super-2 number, since 2×1384688128² = 3834722423648288768, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1351723 + ... + 1352746.

Almost surely, 2^1384688128 is an apocalyptic number.

It is an amenable number.

1384688128 is a deficient number, since it is larger than the sum of its proper divisors (1381984682).

1384688128 is an frugal number, since it uses more digits than its factorization.

1384688128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2704487 (or 2704471 counting only the distinct ones).

The product of its digits is 589824, while the sum is 49.

The square root of 1384688128 is about 37211.3978237851. The cubic root of 1384688128 is about 1114.5955964038.

The spelling of 1384688128 in words is "one billion, three hundred eighty-four million, six hundred eighty-eight thousand, one hundred twenty-eight".