438999 has 16 divisors (see below), whose sum is σ = 653184. Its totient is φ = 260000.

The previous prime is 438989. The next prime is 439007. The reversal of 438999 is 999834.

It is a cyclic number.

It is not a de Polignac number, because 438999 - 2⁴ = 438983 is a prime.

438999 is a modest number, since divided by 999 gives 438 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 438999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1624 + ... + 1874.

It is an arithmetic number, because the mean of its divisors is an integer number (40824).

2⁴³⁸⁹⁹⁹ is an apocalyptic number.

438999 is a deficient number, since it is larger than the sum of its proper divisors (214185).

438999 is a wasteful number, since it uses less digits than its factorization.

438999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318.

The product of its digits is 69984, while the sum is 42.

The square root of 438999 is about 662.5699963023. The cubic root of 438999 is about 76.0013273083.

The spelling of 438999 in words is "four hundred thirty-eight thousand, nine hundred ninety-nine".