8440003445 has 4 divisors (see below), whose sum is σ = 10128004140. Its totient is φ = 6752002752.

The previous prime is 8440003441. The next prime is 8440003457. The reversal of 8440003445 is 5443000448.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3663396676 + 4776606769 = 60526^2 + 69113^2 .

It is a cyclic number.

It is not a de Polignac number, because 8440003445 - 2² = 8440003441 is a prime.

It is a super-2 number, since 2×8440003445² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8440003441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 844000340 + ... + 844000349.

It is an arithmetic number, because the mean of its divisors is an integer number (2532001035).

Almost surely, 2^8440003445 is an apocalyptic number.

It is an amenable number.

8440003445 is a deficient number, since it is larger than the sum of its proper divisors (1688000695).

8440003445 is a wasteful number, since it uses less digits than its factorization.

8440003445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1688000694.

The product of its (nonzero) digits is 30720, while the sum is 32.

The square root of 8440003445 is about 91869.4913722722. The cubic root of 8440003445 is about 2036.0145375794.

It can be divided in two parts, 8440003 and 445, that added together give a palindrome (8440448).

The spelling of 8440003445 in words is "eight billion, four hundred forty million, three thousand, four hundred forty-five".