438520 has 32 divisors (see below), whose sum is σ = 1040400. Its totient is φ = 165888.

The previous prime is 438517. The next prime is 438521. The reversal of 438520 is 25834.

It is a junction number, because it is equal to n+sod(n) for n = 438491 and 438500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438521) 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, 472 + ... + 1048.

2⁴³⁸⁵²⁰ is an apocalyptic number.

438520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 438520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (520200).

438520 is an abundant number, since it is smaller than the sum of its proper divisors (601880).

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

438520 is a wasteful number, since it uses less digits than its factorization.

438520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607 (or 603 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 438520 is about 662.2084264037. The cubic root of 438520 is about 75.9736750931.

Subtracting from 438520 its reverse (25834), we obtain a triangular number (412686 = T₉₀₈).

The spelling of 438520 in words is "four hundred thirty-eight thousand, five hundred twenty".