8442856140 has 48 divisors (see below), whose sum is σ = 23681639520. Its totient is φ = 2247462400.

The previous prime is 8442856117. The next prime is 8442856153. The reversal of 8442856140 is 416582448.

It is a junction number, because it is equal to n+sod(n) for n = 8442856092 and 8442856101.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89511 + ... + 157790.

It is an arithmetic number, because the mean of its divisors is an integer number (493367490).

Almost surely, 2^8442856140 is an apocalyptic number.

It is an amenable number.

8442856140 is an abundant number, since it is smaller than the sum of its proper divisors (15238783380).

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

8442856140 is a wasteful number, since it uses less digits than its factorization.

8442856140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247882 (or 247880 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 42.

The square root of 8442856140 is about 91885.0158622177. The cubic root of 8442856140 is about 2036.2439006073.

The spelling of 8442856140 in words is "eight billion, four hundred forty-two million, eight hundred fifty-six thousand, one hundred forty".