388541540 has 12 divisors (see below), whose sum is σ = 815937276. Its totient is φ = 155416608.

The previous prime is 388541539. The next prime is 388541561. The reversal of 388541540 is 45145883.

It can be written as a sum of positive squares in 2 ways, for example, as 76877824 + 311663716 = 8768^2 + 17654^2 .

It is a junction number, because it is equal to n+sod(n) for n = 388541494 and 388541503.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 9713519 + ... + 9713558.

It is an arithmetic number, because the mean of its divisors is an integer number (67994773).

Almost surely, 2^388541540 is an apocalyptic number.

It is an amenable number.

388541540 is an abundant number, since it is smaller than the sum of its proper divisors (427395736).

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

388541540 is a wasteful number, since it uses less digits than its factorization.

388541540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19427086 (or 19427084 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 38.

The square root of 388541540 is about 19711.4570745037. The cubic root of 388541540 is about 729.7024746135.

The spelling of 388541540 in words is "three hundred eighty-eight million, five hundred forty-one thousand, five hundred forty".