388228211 has 4 divisors (see below), whose sum is σ = 443689392. Its totient is φ = 332767032.

The previous prime is 388228189. The next prime is 388228219. The reversal of 388228211 is 112822883.

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

It is a cyclic number.

It is not a de Polignac number, because 388228211 - 2²² = 384033907 is a prime.

It is a super-3 number, since 3×388228211³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388228219) 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, 27730580 + ... + 27730593.

It is an arithmetic number, because the mean of its divisors is an integer number (110922348).

Almost surely, 2^388228211 is an apocalyptic number.

388228211 is a deficient number, since it is larger than the sum of its proper divisors (55461181).

388228211 is an equidigital number, since it uses as much as digits as its factorization.

388228211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55461180.

The product of its digits is 12288, while the sum is 35.

The square root of 388228211 is about 19703.5075811389. The cubic root of 388228211 is about 729.5062721400.

The spelling of 388228211 in words is "three hundred eighty-eight million, two hundred twenty-eight thousand, two hundred eleven".