388641 has 8 divisors (see below), whose sum is σ = 565344. Its totient is φ = 235520.

The previous prime is 388621. The next prime is 388651. The reversal of 388641 is 146883.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-388641 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 388599 and 388608.

It is not an unprimeable number, because it can be changed into a prime (388621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5856 + ... + 5921.

It is an arithmetic number, because the mean of its divisors is an integer number (70668).

2³⁸⁸⁶⁴¹ is an apocalyptic number.

It is an amenable number.

388641 is a deficient number, since it is larger than the sum of its proper divisors (176703).

388641 is a wasteful number, since it uses less digits than its factorization.

388641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11791.

The product of its digits is 4608, while the sum is 30.

The square root of 388641 is about 623.4107795026. The cubic root of 388641 is about 72.9764733093.

The spelling of 388641 in words is "three hundred eighty-eight thousand, six hundred forty-one".