1388200005 has 32 divisors (see below), whose sum is σ = 2470590720. Its totient is φ = 739569600.

The previous prime is 1388199979. The next prime is 1388200007. The reversal of 1388200005 is 5000028831.

It is a happy number.

It is not a de Polignac number, because 1388200005 - 2⁷ = 1388199877 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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 (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 131680 + ... + 141830.

It is an arithmetic number, because the mean of its divisors is an integer number (77205960).

Almost surely, 2^1388200005 is an apocalyptic number.

1388200005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1388200005 is a deficient number, since it is larger than the sum of its proper divisors (1082390715).

1388200005 is a wasteful number, since it uses less digits than its factorization.

1388200005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11178 (or 11172 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 1388200005 is about 37258.5561314445. The cubic root of 1388200005 is about 1115.5370883343.

Adding to 1388200005 its reverse (5000028831), we get a palindrome (6388228836).

The spelling of 1388200005 in words is "one billion, three hundred eighty-eight million, two hundred thousand, five".