388445 has 4 divisors (see below), whose sum is σ = 466140. Its totient is φ = 310752.

The previous prime is 388403. The next prime is 388459. The reversal of 388445 is 544883.

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

It can be written as a sum of positive squares in 2 ways, for example, as 206116 + 182329 = 454^2 + 427^2 .

It is a cyclic number.

It is not a de Polignac number, because 388445 - 2¹⁴ = 372061 is a prime.

It is an Ulam number.

It is a congruent number.

It is an unprimeable 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, 38840 + ... + 38849.

It is an arithmetic number, because the mean of its divisors is an integer number (116535).

2³⁸⁸⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

388445 is a deficient number, since it is larger than the sum of its proper divisors (77695).

388445 is an equidigital number, since it uses as much as digits as its factorization.

388445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77694.

The product of its digits is 15360, while the sum is 32.

The square root of 388445 is about 623.2535599577. The cubic root of 388445 is about 72.9642033790.

The spelling of 388445 in words is "three hundred eighty-eight thousand, four hundred forty-five".