1438436441 has 4 divisors (see below), whose sum is σ = 1549085412. Its totient is φ = 1327787472.

The previous prime is 1438436407. The next prime is 1438436443. The reversal of 1438436441 is 1446348341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1446348341 = 223 ⋅6485867.

It can be written as a sum of positive squares in 2 ways, for example, as 403849216 + 1034587225 = 20096^2 + 32165^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1438436441 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1438436395 and 1438436404.

It is not an unprimeable number, because it can be changed into a prime (1438436443) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 55324466 + ... + 55324491.

It is an arithmetic number, because the mean of its divisors is an integer number (387271353).

Almost surely, 2^1438436441 is an apocalyptic number.

It is an amenable number.

1438436441 is a deficient number, since it is larger than the sum of its proper divisors (110648971).

1438436441 is a wasteful number, since it uses less digits than its factorization.

1438436441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110648970.

The product of its digits is 110592, while the sum is 38.

The square root of 1438436441 is about 37926.7246278927. The cubic root of 1438436441 is about 1128.8343740427.

The spelling of 1438436441 in words is "one billion, four hundred thirty-eight million, four hundred thirty-six thousand, four hundred forty-one".