8442425538 has 96 divisors (see below), whose sum is σ = 19478899440. Its totient is φ = 2637895680.

The previous prime is 8442425501. The next prime is 8442425543. The reversal of 8442425538 is 8355242448.

It can be written as a sum of positive squares in 8 ways, for example, as 720761409 + 7721664129 = 26847^2 + 87873^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8442425493 and 8442425502.

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 in 47 ways as a sum of consecutive naturals, for example, 4985820 + ... + 4987512.

Almost surely, 2^8442425538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8442425538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9739449720).

8442425538 is an abundant number, since it is smaller than the sum of its proper divisors (11036473902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8442425538 is a wasteful number, since it uses less digits than its factorization.

8442425538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004 (or 2001 counting only the distinct ones).

The product of its digits is 1228800, while the sum is 45.

The square root of 8442425538 is about 91882.6726755377. The cubic root of 8442425538 is about 2036.2092825591.

The spelling of 8442425538 in words is "eight billion, four hundred forty-two million, four hundred twenty-five thousand, five hundred thirty-eight".