438621 has 8 divisors (see below), whose sum is σ = 588000. Its totient is φ = 290832.

The previous prime is 438611. The next prime is 438623. The reversal of 438621 is 126834.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 438621 - 2⁵ = 438589 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 438591 and 438600.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 630 + ... + 1128.

It is an arithmetic number, because the mean of its divisors is an integer number (73500).

2⁴³⁸⁶²¹ is an apocalyptic number.

It is an amenable number.

438621 is a deficient number, since it is larger than the sum of its proper divisors (149379).

438621 is a wasteful number, since it uses less digits than its factorization.

438621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795.

The product of its digits is 1152, while the sum is 24.

The square root of 438621 is about 662.2846819911. The cubic root of 438621 is about 75.9795074019.

The spelling of 438621 in words is "four hundred thirty-eight thousand, six hundred twenty-one".