438749 has 4 divisors (see below), whose sum is σ = 440640. Its totient is φ = 436860.

The previous prime is 438733. The next prime is 438761. The reversal of 438749 is 947834.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 438749 - 2⁴ = 438733 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438769) 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, 539 + ... + 1080.

It is an arithmetic number, because the mean of its divisors is an integer number (110160).

2⁴³⁸⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

438749 is a deficient number, since it is larger than the sum of its proper divisors (1891).

438749 is a wasteful number, since it uses less digits than its factorization.

438749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1890.

The product of its digits is 24192, while the sum is 35.

The square root of 438749 is about 662.3813101228. The cubic root of 438749 is about 75.9868975566.

The spelling of 438749 in words is "four hundred thirty-eight thousand, seven hundred forty-nine".