1388200000 has 168 divisors, whose sum is σ = 3762134208. Its totient is φ = 504000000.

The previous prime is 1388199979. The next prime is 1388200007. The reversal of 1388200000 is 28831.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (1388200007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2199685 + ... + 2200315.

It is an arithmetic number, because the mean of its divisors is an integer number (22393656).

Almost surely, 2^1388200000 is an apocalyptic number.

1388200000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1388200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1881067104).

1388200000 is an abundant number, since it is smaller than the sum of its proper divisors (2373934208).

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

1388200000 is an frugal number, since it uses more digits than its factorization.

1388200000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679 (or 649 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1388200000 is about 37258.5560643458. The cubic root of 1388200000 is about 1115.5370869950.

Adding to 1388200000 its reverse (28831), we get a palindrome (1388228831).

The spelling of 1388200000 in words is "one billion, three hundred eighty-eight million, two hundred thousand".