388687321 has 8 divisors (see below), whose sum is σ = 433044864. Its totient is φ = 345833520.

The previous prime is 388687309. The next prime is 388687367. The reversal of 388687321 is 123786883.

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

It is not a de Polignac number, because 388687321 - 2²³ = 380298713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388687381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 375390 + ... + 376423.

It is an arithmetic number, because the mean of its divisors is an integer number (54130608).

Almost surely, 2^388687321 is an apocalyptic number.

It is an amenable number.

388687321 is a deficient number, since it is larger than the sum of its proper divisors (44357543).

388687321 is a wasteful number, since it uses less digits than its factorization.

388687321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751871.

The product of its digits is 387072, while the sum is 46.

The square root of 388687321 is about 19715.1546024879. The cubic root of 388687321 is about 729.7937247923.

The spelling of 388687321 in words is "three hundred eighty-eight million, six hundred eighty-seven thousand, three hundred twenty-one".