388447 has 4 divisors (see below), whose sum is σ = 405360. Its totient is φ = 371536.

The previous prime is 388403. The next prime is 388459. The reversal of 388447 is 744883.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 744883 = 151 ⋅4933.

It is a cyclic number.

It is not a de Polignac number, because 388447 - 2⁷ = 388319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8422 + ... + 8467.

It is an arithmetic number, because the mean of its divisors is an integer number (101340).

2³⁸⁸⁴⁴⁷ is an apocalyptic number.

388447 is a deficient number, since it is larger than the sum of its proper divisors (16913).

388447 is a wasteful number, since it uses less digits than its factorization.

388447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16912.

The product of its digits is 21504, while the sum is 34.

The square root of 388447 is about 623.2551644391. The cubic root of 388447 is about 72.9643286032.

The spelling of 388447 in words is "three hundred eighty-eight thousand, four hundred forty-seven".