842442489 has 48 divisors (see below), whose sum is σ = 1445558400. Its totient is φ = 462567168.

The previous prime is 842442481. The next prime is 842442493. The reversal of 842442489 is 984244248.

It is not a de Polignac number, because 842442489 - 2³ = 842442481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (842442481) 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 47 ways as a sum of consecutive naturals, for example, 424702 + ... + 426680.

It is an arithmetic number, because the mean of its divisors is an integer number (30115800).

Almost surely, 2^842442489 is an apocalyptic number.

It is an amenable number.

842442489 is a deficient number, since it is larger than the sum of its proper divisors (603115911).

842442489 is a wasteful number, since it uses less digits than its factorization.

842442489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2254 (or 2251 counting only the distinct ones).

The product of its digits is 589824, while the sum is 45.

The square root of 842442489 is about 29024.8598446229. The cubic root of 842442489 is about 944.4524282196.

The spelling of 842442489 in words is "eight hundred forty-two million, four hundred forty-two thousand, four hundred eighty-nine".