• 388 can be written using four 4's:

See also 113.

---

388 has 6 divisors (see below), whose sum is σ = 686. Its totient is φ = 192.

The previous prime is 383. The next prime is 389. The reversal of 388 is 883.

388 is nontrivially palindromic in base 11.

388 is an esthetic number in base 11, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in only one way, i.e., 324 + 64 = 18^2 + 8^2 .

388 is an undulating number in base 11.

It is a plaindrome in base 6, base 10, base 13 and base 15.

It is not an unprimeable number, because it can be changed into a prime (383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45 + ... + 52.

It is an amenable number.

388 is a deficient number, since it is larger than the sum of its proper divisors (298).

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

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

The sum of its prime factors is 101 (or 99 counting only the distinct ones).

The product of its digits is 192, while the sum is 19.

The square root of 388 is about 19.6977156036. The cubic root of 388 is about 7.2936330298.

Subtracting from 388 its product of digits (192), we obtain a square (196 = 14²).

It can be divided in two parts, 3 and 88, that added together give a triangular number (91 = T₁₃).

The spelling of 388 in words is "three hundred eighty-eight", and thus it is an aban number and an oban number.