388380009 has 8 divisors (see below), whose sum is σ = 531835840. Its totient is φ = 251922096.

The previous prime is 388379989. The next prime is 388380017. The reversal of 388380009 is 900083883.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 388380009 - 2¹² = 388375913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388380029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1749349 + ... + 1749570.

It is an arithmetic number, because the mean of its divisors is an integer number (66479480).

Almost surely, 2^388380009 is an apocalyptic number.

It is an amenable number.

388380009 is a deficient number, since it is larger than the sum of its proper divisors (143455831).

388380009 is a wasteful number, since it uses less digits than its factorization.

388380009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3498959.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 388380009 is about 19707.3592599313. The cubic root of 388380009 is about 729.6013392167.

The spelling of 388380009 in words is "three hundred eighty-eight million, three hundred eighty thousand, nine".