438921231 has 16 divisors (see below), whose sum is σ = 669216768. Its totient is φ = 250668000.

The previous prime is 438921227. The next prime is 438921233. The reversal of 438921231 is 132129834.

It is not a de Polignac number, because 438921231 - 2² = 438921227 is a prime.

It is a super-2 number, since 2×438921231² = 385303694045110722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 438921192 and 438921201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438921233) 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 15 ways as a sum of consecutive naturals, for example, 39381 + ... + 49281.

It is an arithmetic number, because the mean of its divisors is an integer number (41826048).

Almost surely, 2^438921231 is an apocalyptic number.

438921231 is a deficient number, since it is larger than the sum of its proper divisors (230295537).

438921231 is a wasteful number, since it uses less digits than its factorization.

438921231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12022.

The product of its digits is 10368, while the sum is 33.

The square root of 438921231 is about 20950.4470358033. The cubic root of 438921231 is about 759.9683914601.

The spelling of 438921231 in words is "four hundred thirty-eight million, nine hundred twenty-one thousand, two hundred thirty-one".