388985 has 4 divisors (see below), whose sum is σ = 466788. Its totient is φ = 311184.

The previous prime is 388963. The next prime is 388991. The reversal of 388985 is 589883.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 226576 + 162409 = 476^2 + 403^2 .

It is a cyclic number.

It is not a de Polignac number, because 388985 - 2¹² = 384889 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38894 + ... + 38903.

It is an arithmetic number, because the mean of its divisors is an integer number (116697).

2³⁸⁸⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

388985 is a deficient number, since it is larger than the sum of its proper divisors (77803).

388985 is an equidigital number, since it uses as much as digits as its factorization.

388985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77802.

The product of its digits is 69120, while the sum is 41.

The square root of 388985 is about 623.6866200264. The cubic root of 388985 is about 72.9979983188.

It can be divided in two parts, 3 and 88985, that added together give a palindrome (88988).

The spelling of 388985 in words is "three hundred eighty-eight thousand, nine hundred eighty-five".