438542 has 16 divisors (see below), whose sum is σ = 719712. Its totient is φ = 199200.

The previous prime is 438533. The next prime is 438551. The reversal of 438542 is 245834.

It is an interprime number because it is at equal distance from previous prime (438533) and next prime (438551).

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

438542 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2543 + ... + 2709.

It is an arithmetic number, because the mean of its divisors is an integer number (44982).

2⁴³⁸⁵⁴² is an apocalyptic number.

438542 is a deficient number, since it is larger than the sum of its proper divisors (281170).

438542 is a wasteful number, since it uses less digits than its factorization.

438542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283.

The product of its digits is 3840, while the sum is 26.

The square root of 438542 is about 662.2250372796. The cubic root of 438542 is about 75.9749455733.

Subtracting from 438542 its sum of digits (26), we obtain a triangular number (438516 = T₉₃₆).

The spelling of 438542 in words is "four hundred thirty-eight thousand, five hundred forty-two".