438658 has 16 divisors (see below), whose sum is σ = 728064. Its totient is φ = 196560.

The previous prime is 438637. The next prime is 438661. The reversal of 438658 is 856834.

It is an unprimeable number.

438658 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2716 + ... + 2872.

It is an arithmetic number, because the mean of its divisors is an integer number (45504).

2⁴³⁸⁶⁵⁸ is an apocalyptic number.

438658 is a deficient number, since it is larger than the sum of its proper divisors (289406).

438658 is a wasteful number, since it uses less digits than its factorization.

438658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297.

The product of its digits is 23040, while the sum is 34.

The square root of 438658 is about 662.3126150090. The cubic root of 438658 is about 75.9816437662.

It can be divided in two parts, 4386 and 58, that added together give a palindrome (4444).

The spelling of 438658 in words is "four hundred thirty-eight thousand, six hundred fifty-eight".