388687 has 8 divisors (see below), whose sum is σ = 433440. Its totient is φ = 346080.

The previous prime is 388673. The next prime is 388691. The reversal of 388687 is 786883.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-388687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139 + ... + 892.

It is an arithmetic number, because the mean of its divisors is an integer number (54180).

2³⁸⁸⁶⁸⁷ is an apocalyptic number.

388687 is a deficient number, since it is larger than the sum of its proper divisors (44753).

388687 is a wasteful number, since it uses less digits than its factorization.

388687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073.

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

The square root of 388687 is about 623.4476722228. The cubic root of 388687 is about 72.9793523891.

The spelling of 388687 in words is "three hundred eighty-eight thousand, six hundred eighty-seven".