438148538 has 4 divisors (see below), whose sum is σ = 657222810. Its totient is φ = 219074268.

The previous prime is 438148519. The next prime is 438148541. The reversal of 438148538 is 835841834.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 835841834 = 2 ⋅417920917.

It can be written as a sum of positive squares in only one way, i.e., 422836969 + 15311569 = 20563^2 + 3913^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109537133 + ... + 109537136.

Almost surely, 2^438148538 is an apocalyptic number.

438148538 is a deficient number, since it is larger than the sum of its proper divisors (219074272).

438148538 is a wasteful number, since it uses less digits than its factorization.

438148538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219074271.

The product of its digits is 368640, while the sum is 44.

The square root of 438148538 is about 20931.9979457289. The cubic root of 438148538 is about 759.5221707859.

The spelling of 438148538 in words is "four hundred thirty-eight million, one hundred forty-eight thousand, five hundred thirty-eight".