388391111680 has 352 divisors, whose sum is σ = 1098087439680. Its totient is φ = 129950023680.

The previous prime is 388391111657. The next prime is 388391111687. The reversal of 388391111680 is 86111193883.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (352).

It is not an unprimeable number, because it can be changed into a prime (388391111687) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 299452792 + ... + 299454088.

It is an arithmetic number, because the mean of its divisors is an integer number (3119566590).

Almost surely, 2^388391111680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 388391111680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (549043719840).

388391111680 is an abundant number, since it is smaller than the sum of its proper divisors (709696328000).

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

388391111680 is a wasteful number, since it uses less digits than its factorization.

388391111680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1755 (or 1737 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 49.

The spelling of 388391111680 in words is "three hundred eighty-eight billion, three hundred ninety-one million, one hundred eleven thousand, six hundred eighty".