388128334880 has 384 divisors, whose sum is σ = 1095565927680. Its totient is φ = 128086179840.

The previous prime is 388128334871. The next prime is 388128334933. The reversal of 388128334880 is 88433821883.

It is a happy number.

It is a super-2 number, since 2×388128334880² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 397264952 + ... + 397265928.

It is an arithmetic number, because the mean of its divisors is an integer number (2853036270).

Almost surely, 2^388128334880 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 388128334880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (547782963840).

388128334880 is an abundant number, since it is smaller than the sum of its proper divisors (707437592800).

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

388128334880 is a wasteful number, since it uses less digits than its factorization.

388128334880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292 (or 1284 counting only the distinct ones).

The product of its (nonzero) digits is 7077888, while the sum is 56.

The spelling of 388128334880 in words is "three hundred eighty-eight billion, one hundred twenty-eight million, three hundred thirty-four thousand, eight hundred eighty".