388918 has 8 divisors (see below), whose sum is σ = 587448. Its totient is φ = 193104.

The previous prime is 388903. The next prime is 388931. The reversal of 388918 is 819883.

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

It is a congruent number.

It is an unprimeable number.

388918 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 271 + ... + 922.

It is an arithmetic number, because the mean of its divisors is an integer number (73431).

2³⁸⁸⁹¹⁸ is an apocalyptic number.

388918 is a deficient number, since it is larger than the sum of its proper divisors (198530).

388918 is a wasteful number, since it uses less digits than its factorization.

388918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358.

The product of its digits is 13824, while the sum is 37.

The square root of 388918 is about 623.6329048407. The cubic root of 388918 is about 72.9938069432.

The spelling of 388918 in words is "three hundred eighty-eight thousand, nine hundred eighteen".