1388009147044 has 81 divisors (see below), whose sum is σ = 2660352936969. Its totient is φ = 633366988800.

The previous prime is 1388009147023. The next prime is 1388009147059. The reversal of 1388009147044 is 4407419008831.

The square root of 1388009147044 is 1178138.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 1148888147044 + 239121000000 = 1071862^2 + 489000^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3461369244 + ... + 3461369644.

Almost surely, 2^{1388009147044} is an apocalyptic number.

1388009147044 is the 1178138-th square number.

It is an amenable number.

1388009147044 is a deficient number, since it is larger than the sum of its proper divisors (1272343789925).

1388009147044 is an equidigital number, since it uses as much as digits as its factorization.

1388009147044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058 (or 529 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 49.

Multiplying 1388009147044 by its sum of digits (49), we get a square (68012448205156 = 8246966²).

The spelling of 1388009147044 in words is "one trillion, three hundred eighty-eight billion, nine million, one hundred forty-seven thousand, forty-four".