1238445445 has 4 divisors (see below), whose sum is σ = 1486134540. Its totient is φ = 990756352.

The previous prime is 1238445431. The next prime is 1238445449. The reversal of 1238445445 is 5445448321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5445448321 = 179 ⋅30421499.

It can be written as a sum of positive squares in 2 ways, for example, as 165096801 + 1073348644 = 12849^2 + 32762^2 .

It is a cyclic number.

It is not a de Polignac number, because 1238445445 - 2¹³ = 1238437253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1238445398 and 1238445407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1238445449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123844540 + ... + 123844549.

It is an arithmetic number, because the mean of its divisors is an integer number (371533635).

Almost surely, 2^1238445445 is an apocalyptic number.

It is an amenable number.

1238445445 is a deficient number, since it is larger than the sum of its proper divisors (247689095).

1238445445 is an equidigital number, since it uses as much as digits as its factorization.

1238445445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247689094.

The product of its digits is 307200, while the sum is 40.

The square root of 1238445445 is about 35191.5536031020. The cubic root of 1238445445 is about 1073.8879273119.

The spelling of 1238445445 in words is "one billion, two hundred thirty-eight million, four hundred forty-five thousand, four hundred forty-five".