1388209912320 has 320 divisors, whose sum is σ = 5533010436096. Its totient is φ = 288459079680.

The previous prime is 1388209912283. The next prime is 1388209912337. The reversal of 1388209912320 is 232199028831.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1388209912320.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 582384 + ... + 1765103.

Almost surely, 2^{1388209912320} is an apocalyptic number.

1388209912320 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 1388209912320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2766505218048).

1388209912320 is an abundant number, since it is smaller than the sum of its proper divisors (4144800523776).

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

1388209912320 is a wasteful number, since it uses less digits than its factorization.

1388209912320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2347531 (or 2347515 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 48.

The spelling of 1388209912320 in words is "one trillion, three hundred eighty-eight billion, two hundred nine million, nine hundred twelve thousand, three hundred twenty".