1438742834 has 4 divisors (see below), whose sum is σ = 2158114254. Its totient is φ = 719371416.

The previous prime is 1438742821. The next prime is 1438742839. The reversal of 1438742834 is 4382478341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4382478341 = 137 ⋅31988893.

It can be written as a sum of positive squares in only one way, i.e., 758837209 + 679905625 = 27547^2 + 26075^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1438742839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359685707 + ... + 359685710.

Almost surely, 2^1438742834 is an apocalyptic number.

1438742834 is a deficient number, since it is larger than the sum of its proper divisors (719371420).

1438742834 is an equidigital number, since it uses as much as digits as its factorization.

1438742834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719371419.

The product of its digits is 516096, while the sum is 44.

The square root of 1438742834 is about 37930.7636885945. The cubic root of 1438742834 is about 1128.9145171727.

The spelling of 1438742834 in words is "one billion, four hundred thirty-eight million, seven hundred forty-two thousand, eight hundred thirty-four".