438764243 has 4 divisors (see below), whose sum is σ = 438822000. Its totient is φ = 438706488.

The previous prime is 438764239. The next prime is 438764251. The reversal of 438764243 is 342467834.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 438764243 - 2² = 438764239 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 438764243.

It is not an unprimeable number, because it can be changed into a prime (438764143) 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 3 ways as a sum of consecutive naturals, for example, 15380 + ... + 33377.

It is an arithmetic number, because the mean of its divisors is an integer number (109705500).

Almost surely, 2^438764243 is an apocalyptic number.

438764243 is a deficient number, since it is larger than the sum of its proper divisors (57757).

438764243 is an equidigital number, since it uses as much as digits as its factorization.

438764243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57756.

The product of its digits is 387072, while the sum is 41.

The square root of 438764243 is about 20946.7000503659. The cubic root of 438764243 is about 759.8777752430.

The spelling of 438764243 in words is "four hundred thirty-eight million, seven hundred sixty-four thousand, two hundred forty-three".