388636 has 6 divisors (see below), whose sum is σ = 680120. Its totient is φ = 194316.

The previous prime is 388621. The next prime is 388651. The reversal of 388636 is 636883.

388636 is nontrivially palindromic in base 7.

It is an interprime number because it is at equal distance from previous prime (388621) and next prime (388651).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

388636 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, 48576 + ... + 48583.

2³⁸⁸⁶³⁶ is an apocalyptic number.

It is an amenable number.

388636 is a deficient number, since it is larger than the sum of its proper divisors (291484).

388636 is a wasteful number, since it uses less digits than its factorization.

388636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97163 (or 97161 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 388636 is about 623.4067692927. The cubic root of 388636 is about 72.9761603521.

It can be divided in two parts, 388 and 636, that added together give a 10-th power (1024 = 2¹⁰).

The spelling of 388636 in words is "three hundred eighty-eight thousand, six hundred thirty-six".