438998 has 8 divisors (see below), whose sum is σ = 752592. Its totient is φ = 188136.

The previous prime is 438989. The next prime is 439007. The reversal of 438998 is 899834.

It is an interprime number because it is at equal distance from previous prime (438989) and next prime (439007).

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

438998 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 15665 + ... + 15692.

It is an arithmetic number, because the mean of its divisors is an integer number (94074).

2⁴³⁸⁹⁹⁸ is an apocalyptic number.

438998 is a deficient number, since it is larger than the sum of its proper divisors (313594).

438998 is a wasteful number, since it uses less digits than its factorization.

438998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31366.

The product of its digits is 62208, while the sum is 41.

The square root of 438998 is about 662.5692416646. The cubic root of 438998 is about 76.0012696002.

The spelling of 438998 in words is "four hundred thirty-eight thousand, nine hundred ninety-eight".