438783121 has 8 divisors (see below), whose sum is σ = 523269504. Its totient is φ = 359747520.

The previous prime is 438783113. The next prime is 438783173. The reversal of 438783121 is 121387834.

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

It is a cyclic number.

It is not a de Polignac number, because 438783121 - 2³ = 438783113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (438783221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1362520 + ... + 1362841.

It is an arithmetic number, because the mean of its divisors is an integer number (65408688).

Almost surely, 2^438783121 is an apocalyptic number.

It is an amenable number.

438783121 is a deficient number, since it is larger than the sum of its proper divisors (84486383).

438783121 is a wasteful number, since it uses less digits than its factorization.

438783121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2725391.

The product of its digits is 32256, while the sum is 37.

The square root of 438783121 is about 20947.1506654246. The cubic root of 438783121 is about 759.8886730978. Note that the first 3 decimals are identical.

The spelling of 438783121 in words is "four hundred thirty-eight million, seven hundred eighty-three thousand, one hundred twenty-one".