438940 has 24 divisors (see below), whose sum is σ = 976752. Its totient is φ = 165120.

The previous prime is 438937. The next prime is 438941. The reversal of 438940 is 49834.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 438899 and 438908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438941) 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, 306 + ... + 985.

It is an arithmetic number, because the mean of its divisors is an integer number (40698).

438940 is a Friedman number, since it can be written as (80-4)^3-9*4, using all its digits and the basic arithmetic operations.

2⁴³⁸⁹⁴⁰ is an apocalyptic number.

It is an amenable number.

438940 is an abundant number, since it is smaller than the sum of its proper divisors (537812).

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

438940 is a wasteful number, since it uses less digits than its factorization.

438940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317 (or 1315 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 438940 is about 662.5254712085. The cubic root of 438940 is about 75.9979223809.

It can be divided in two parts, 438 and 940, that added together give a triangular number (1378 = T₅₂).

The spelling of 438940 in words is "four hundred thirty-eight thousand, nine hundred forty".