388531746 has 48 divisors (see below), whose sum is σ = 884742144. Its totient is φ = 123070752.

The previous prime is 388531729. The next prime is 388531777. The reversal of 388531746 is 647135883.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21855 + ... + 35421.

It is an arithmetic number, because the mean of its divisors is an integer number (18432128).

Almost surely, 2^388531746 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 388531746, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (442371072).

388531746 is an abundant number, since it is smaller than the sum of its proper divisors (496210398).

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

388531746 is a wasteful number, since it uses less digits than its factorization.

388531746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13655 (or 13652 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 388531746 is about 19711.2086387416. The cubic root of 388531746 is about 729.6963433376.

The spelling of 388531746 in words is "three hundred eighty-eight million, five hundred thirty-one thousand, seven hundred forty-six".