388887999 has 8 divisors (see below), whose sum is σ = 536397360. Its totient is φ = 250318656.

The previous prime is 388887997. The next prime is 388888013. The reversal of 388887999 is 999788883.

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

It is not a de Polignac number, because 388887999 - 2¹ = 388887997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388887997) 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, 2234902 + ... + 2235075.

It is an arithmetic number, because the mean of its divisors is an integer number (67049670).

Almost surely, 2^388887999 is an apocalyptic number.

388887999 is a deficient number, since it is larger than the sum of its proper divisors (147509361).

388887999 is a wasteful number, since it uses less digits than its factorization.

388887999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4470009.

The product of its digits is 62705664, while the sum is 69.

The square root of 388887999 is about 19720.2433808511. The cubic root of 388887999 is about 729.9192998925.

The spelling of 388887999 in words is "three hundred eighty-eight million, eight hundred eighty-seven thousand, nine hundred ninety-nine".