438318938 has 4 divisors (see below), whose sum is σ = 657478410. Its totient is φ = 219159468.

The previous prime is 438318929. The next prime is 438318941. The reversal of 438318938 is 839813834.

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

It can be written as a sum of positive squares in only one way, i.e., 240157009 + 198161929 = 15497^2 + 14077^2 .

It is a junction number, because it is equal to n+sod(n) for n = 438318892 and 438318901.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 109579733 + ... + 109579736.

Almost surely, 2^438318938 is an apocalyptic number.

438318938 is a deficient number, since it is larger than the sum of its proper divisors (219159472).

438318938 is a wasteful number, since it uses less digits than its factorization.

438318938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219159471.

The product of its digits is 497664, while the sum is 47.

The square root of 438318938 is about 20936.0678734093. The cubic root of 438318938 is about 759.6206197459.

The spelling of 438318938 in words is "four hundred thirty-eight million, three hundred eighteen thousand, nine hundred thirty-eight".