388217 has 4 divisors (see below), whose sum is σ = 405120. Its totient is φ = 371316.

The previous prime is 388211. The next prime is 388231. The reversal of 388217 is 712883.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-388217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 388217.

It is not an unprimeable number, because it can be changed into a prime (388211) 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, 8417 + ... + 8462.

It is an arithmetic number, because the mean of its divisors is an integer number (101280).

2³⁸⁸²¹⁷ is an apocalyptic number.

It is an amenable number.

388217 is a deficient number, since it is larger than the sum of its proper divisors (16903).

388217 is a wasteful number, since it uses less digits than its factorization.

388217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16902.

The product of its digits is 2688, while the sum is 29.

The square root of 388217 is about 623.0706220004. The cubic root of 388217 is about 72.9499250004.

The spelling of 388217 in words is "three hundred eighty-eight thousand, two hundred seventeen".