388540 has 12 divisors (see below), whose sum is σ = 815976. Its totient is φ = 155408.

The previous prime is 388529. The next prime is 388541. The reversal of 388540 is 45883.

It is a junction number, because it is equal to n+sod(n) for n = 388499 and 388508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388541) 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 3 ways as a sum of consecutive naturals, for example, 9694 + ... + 9733.

It is an arithmetic number, because the mean of its divisors is an integer number (67998).

2³⁸⁸⁵⁴⁰ is an apocalyptic number.

It is an amenable number.

388540 is an abundant number, since it is smaller than the sum of its proper divisors (427436).

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

388540 is a wasteful number, since it uses less digits than its factorization.

388540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19436 (or 19434 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 388540 is about 623.3297682607. The cubic root of 388540 is about 72.9701510544.

The spelling of 388540 in words is "three hundred eighty-eight thousand, five hundred forty".