438920 has 16 divisors (see below), whose sum is σ = 987660. Its totient is φ = 175552.

The previous prime is 438913. The next prime is 438937. The reversal of 438920 is 29834.

It can be written as a sum of positive squares in 2 ways, for example, as 438244 + 676 = 662^2 + 26^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 438920.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5447 + ... + 5526.

2⁴³⁸⁹²⁰ is an apocalyptic number.

438920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

438920 is an abundant number, since it is smaller than the sum of its proper divisors (548740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

438920 is a wasteful number, since it uses less digits than its factorization.

438920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10984 (or 10980 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 438920 is about 662.5103772772. The cubic root of 438920 is about 75.9967680989.

The spelling of 438920 in words is "four hundred thirty-eight thousand, nine hundred twenty".