388841684640 has 192 divisors, whose sum is σ = 1261941980544. Its totient is φ = 100568936448.

The previous prime is 388841684551. The next prime is 388841684653. The reversal of 388841684640 is 46486148883.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5595387 + ... + 5664453.

It is an arithmetic number, because the mean of its divisors is an integer number (6572614482).

Almost surely, 2^388841684640 is an apocalyptic number.

388841684640 is a gapful number since it is divisible by the number (30) 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 388841684640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (630970990272).

388841684640 is an abundant number, since it is smaller than the sum of its proper divisors (873100295904).

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

388841684640 is a wasteful number, since it uses less digits than its factorization.

388841684640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69439 (or 69431 counting only the distinct ones).

The product of its (nonzero) digits is 28311552, while the sum is 60.

The spelling of 388841684640 in words is "three hundred eighty-eight billion, eight hundred forty-one million, six hundred eighty-four thousand, six hundred forty".