388243 has 4 divisors (see below), whose sum is σ = 390208. Its totient is φ = 386280.

The previous prime is 388237. The next prime is 388253. The reversal of 388243 is 342883.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342883 = 41 ⋅8363.

It is a cyclic number.

It is not a de Polignac number, because 388243 - 2⁵ = 388211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388253) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 648 + ... + 1093.

It is an arithmetic number, because the mean of its divisors is an integer number (97552).

2³⁸⁸²⁴³ is an apocalyptic number.

388243 is a deficient number, since it is larger than the sum of its proper divisors (1965).

388243 is a wasteful number, since it uses less digits than its factorization.

388243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1964.

The product of its digits is 4608, while the sum is 28.

The square root of 388243 is about 623.0914860596. The cubic root of 388243 is about 72.9515535189.

It can be divided in two parts, 38 and 8243, that added together give a square (8281 = 91²).

The spelling of 388243 in words is "three hundred eighty-eight thousand, two hundred forty-three".