388869 has 16 divisors (see below), whose sum is σ = 571200. Its totient is φ = 235248.

The previous prime is 388859. The next prime is 388879. The reversal of 388869 is 968883.

It is an interprime number because it is at equal distance from previous prime (388859) and next prime (388879).

It is not a de Polignac number, because 388869 - 2⁵ = 388837 is a prime.

It is a super-2 number, since 2×388869² = 302438198322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 388869.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 388869.

It is not an unprimeable number, because it can be changed into a prime (388859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6562 + ... + 6620.

It is an arithmetic number, because the mean of its divisors is an integer number (35700).

2³⁸⁸⁸⁶⁹ is an apocalyptic number.

388869 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

388869 is a deficient number, since it is larger than the sum of its proper divisors (182331).

388869 is an equidigital number, since it uses as much as digits as its factorization.

388869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101 (or 75 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 388869 is about 623.5936176710. The cubic root of 388869 is about 72.9907413040.

The spelling of 388869 in words is "three hundred eighty-eight thousand, eight hundred sixty-nine".