388055538 has 48 divisors (see below), whose sum is σ = 909207936. Its totient is φ = 118908000.

The previous prime is 388055533. The next prime is 388055539. The reversal of 388055538 is 835550883.

388055538 is a `hidden beast` number, since 38 + 80 + 5 + 5 + 538 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 388055493 and 388055502.

It is not an unprimeable number, because it can be changed into a prime (388055533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55431 + ... + 62037.

It is an arithmetic number, because the mean of its divisors is an integer number (18941832).

Almost surely, 2^388055538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 388055538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (454603968).

388055538 is an abundant number, since it is smaller than the sum of its proper divisors (521152398).

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

388055538 is a wasteful number, since it uses less digits than its factorization.

388055538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6879 (or 6876 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 45.

The square root of 388055538 is about 19699.1253105309. The cubic root of 388055538 is about 729.3981014705.

The spelling of 388055538 in words is "three hundred eighty-eight million, fifty-five thousand, five hundred thirty-eight".