438890 has 8 divisors (see below), whose sum is σ = 790020. Its totient is φ = 175552.

The previous prime is 438887. The next prime is 438899. The reversal of 438890 is 98834.

438890 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 421201 + 17689 = 649^2 + 133^2 .

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

It is not an unprimeable number, because it can be changed into a prime (438899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21935 + ... + 21954.

2⁴³⁸⁸⁹⁰ is an apocalyptic number.

438890 is a deficient number, since it is larger than the sum of its proper divisors (351130).

438890 is a wasteful number, since it uses less digits than its factorization.

438890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43896.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 438890 is about 662.4877357355. The cubic root of 438890 is about 75.9950366103.

The spelling of 438890 in words is "four hundred thirty-eight thousand, eight hundred ninety".