388706 has 4 divisors (see below), whose sum is σ = 583062. Its totient is φ = 194352.

The previous prime is 388699. The next prime is 388711. The reversal of 388706 is 607883.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 330625 + 58081 = 575^2 + 241^2 .

It is an unprimeable number.

388706 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 (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97175 + ... + 97178.

2³⁸⁸⁷⁰⁶ is an apocalyptic number.

388706 is a deficient number, since it is larger than the sum of its proper divisors (194356).

388706 is a wasteful number, since it uses less digits than its factorization.

388706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194355.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 388706 is about 623.4629098832. The cubic root of 388706 is about 72.9805415079.

The spelling of 388706 in words is "three hundred eighty-eight thousand, seven hundred six".