388230817 has 4 divisors (see below), whose sum is σ = 418094740. Its totient is φ = 358366896.

The previous prime is 388230809. The next prime is 388230827. The reversal of 388230817 is 718032883.

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 133541136 + 254689681 = 11556^2 + 15959^2 .

It is a cyclic number.

It is not a de Polignac number, because 388230817 - 2³ = 388230809 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 388230817.

It is not an unprimeable number, because it can be changed into a prime (388230827) 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, 14931942 + ... + 14931967.

It is an arithmetic number, because the mean of its divisors is an integer number (104523685).

Almost surely, 2^388230817 is an apocalyptic number.

It is an amenable number.

388230817 is a deficient number, since it is larger than the sum of its proper divisors (29863923).

388230817 is a wasteful number, since it uses less digits than its factorization.

388230817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29863922.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 388230817 is about 19703.5737113855. The cubic root of 388230817 is about 729.5079044180.

The spelling of 388230817 in words is "three hundred eighty-eight million, two hundred thirty thousand, eight hundred seventeen".