1388080800 has 360 divisors, whose sum is σ = 5232915072. Its totient is φ = 357696000.

The previous prime is 1388080783. The next prime is 1388080801. The reversal of 1388080800 is 80808831.

It is a tau number, because it is divible by the number of its divisors (360).

It is a super-4 number, since 4×1388080800⁴ (a number of 38 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388080801) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 2008455 + ... + 2009145.

Almost surely, 2^1388080800 is an apocalyptic number.

1388080800 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 1388080800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2616457536).

1388080800 is an abundant number, since it is smaller than the sum of its proper divisors (3844834272).

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

1388080800 is a wasteful number, since it uses less digits than its factorization.

1388080800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754 (or 732 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 1388080800 is about 37256.9563974300. The cubic root of 1388080800 is about 1115.5051569593.

The spelling of 1388080800 in words is "one billion, three hundred eighty-eight million, eighty thousand, eight hundred".