438866 has 4 divisors (see below), whose sum is σ = 658302. Its totient is φ = 219432.

The previous prime is 438853. The next prime is 438869. The reversal of 438866 is 668834.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 330625 + 108241 = 575^2 + 329^2 .

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (438869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109715 + ... + 109718.

2⁴³⁸⁸⁶⁶ is an apocalyptic number.

438866 is a deficient number, since it is larger than the sum of its proper divisors (219436).

438866 is a wasteful number, since it uses less digits than its factorization.

438866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219435.

The product of its digits is 27648, while the sum is 35.

The square root of 438866 is about 662.4696219450. The cubic root of 438866 is about 75.9936513626.

The spelling of 438866 in words is "four hundred thirty-eight thousand, eight hundred sixty-six".