438981 has 8 divisors (see below), whose sum is σ = 590304. Its totient is φ = 290160.

The previous prime is 438979. The next prime is 438983. The reversal of 438981 is 189834.

It is an interprime number because it is at equal distance from previous prime (438979) and next prime (438983).

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

It is not a de Polignac number, because 438981 - 2¹ = 438979 is a prime.

It is a super-2 number, since 2×438981² = 385408636722, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

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 438981.

It is not an unprimeable number, because it can be changed into a prime (438983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166 + ... + 951.

It is an arithmetic number, because the mean of its divisors is an integer number (73788).

2⁴³⁸⁹⁸¹ is an apocalyptic number.

It is an amenable number.

438981 is a deficient number, since it is larger than the sum of its proper divisors (151323).

438981 is a wasteful number, since it uses less digits than its factorization.

438981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251.

The product of its digits is 6912, while the sum is 33.

The square root of 438981 is about 662.5564126925. The cubic root of 438981 is about 76.0002885492. Note that the first 3 decimals are identical.

The spelling of 438981 in words is "four hundred thirty-eight thousand, nine hundred eighty-one".