388475409 has 8 divisors (see below), whose sum is σ = 591962560. Its totient is φ = 221985936.

The previous prime is 388475401. The next prime is 388475429. The reversal of 388475409 is 904574883.

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

It is not a de Polignac number, because 388475409 - 2³ = 388475401 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (388475401) 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, 9249394 + ... + 9249435.

It is an arithmetic number, because the mean of its divisors is an integer number (73995320).

Almost surely, 2^388475409 is an apocalyptic number.

It is an amenable number.

388475409 is a deficient number, since it is larger than the sum of its proper divisors (203487151).

388475409 is a wasteful number, since it uses less digits than its factorization.

388475409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18498839.

The product of its (nonzero) digits is 967680, while the sum is 48.

The square root of 388475409 is about 19709.7795269252. The cubic root of 388475409 is about 729.6610730408.

The spelling of 388475409 in words is "three hundred eighty-eight million, four hundred seventy-five thousand, four hundred nine".