438629 has 4 divisors (see below), whose sum is σ = 440076. Its totient is φ = 437184.

The previous prime is 438623. The next prime is 438631. The reversal of 438629 is 926834.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16129 + 422500 = 127^2 + 650^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 438595 and 438604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438623) 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, 74 + ... + 939.

It is an arithmetic number, because the mean of its divisors is an integer number (110019).

2⁴³⁸⁶²⁹ is an apocalyptic number.

It is an amenable number.

438629 is a deficient number, since it is larger than the sum of its proper divisors (1447).

438629 is a wasteful number, since it uses less digits than its factorization.

438629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446.

The product of its digits is 10368, while the sum is 32.

The square root of 438629 is about 662.2907216623. The cubic root of 438629 is about 75.9799693287.

The spelling of 438629 in words is "four hundred thirty-eight thousand, six hundred twenty-nine".