1388387328 has 176 divisors, whose sum is σ = 3898798080. Its totient is φ = 438681600.

The previous prime is 1388387327. The next prime is 1388387347. The reversal of 1388387328 is 8237838831.

Its product of digits (1548288) is a multiple of the sum of its prime divisors (336).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388387327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5809033 + ... + 5809271.

Almost surely, 2^1388387328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1388387328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1949399040).

1388387328 is an abundant number, since it is smaller than the sum of its proper divisors (2510410752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1388387328 is a wasteful number, since it uses less digits than its factorization.

1388387328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354 (or 336 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 51.

The square root of 1388387328 is about 37261.0698719186. The cubic root of 1388387328 is about 1115.5872627460.

The spelling of 1388387328 in words is "one billion, three hundred eighty-eight million, three hundred eighty-seven thousand, three hundred twenty-eight".