388999 has 8 divisors (see below), whose sum is σ = 437472. Its totient is φ = 343200.

The previous prime is 388991. The next prime is 389003. The reversal of 388999 is 999883.

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

It is not a de Polignac number, because 388999 - 2³ = 388991 is a prime.

It is a Duffinian number.

388999 is a modest number, since divided by 999 gives 388 as remainder.

388999 is a lucky number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388991) 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, 352 + ... + 949.

It is an arithmetic number, because the mean of its divisors is an integer number (54684).

388999 is a Friedman number, since it can be written as (9+8*8)^3-9-9, using all its digits and the basic arithmetic operations.

2³⁸⁸⁹⁹⁹ is an apocalyptic number.

388999 is a deficient number, since it is larger than the sum of its proper divisors (48473).

388999 is a wasteful number, since it uses less digits than its factorization.

388999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1337.

The product of its digits is 139968, while the sum is 46.

The square root of 388999 is about 623.6978435108. The cubic root of 388999 is about 72.9988740678.

The spelling of 388999 in words is "three hundred eighty-eight thousand, nine hundred ninety-nine".