842720508 has 72 divisors (see below), whose sum is σ = 2440488960. Its totient is φ = 240187680.

The previous prime is 842720449. The next prime is 842720531. The reversal of 842720508 is 805027248.

It is a happy number.

842720508 is a `hidden beast` number, since 84 + 2 + 72 + 0 + 508 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 104733 + ... + 112491.

It is an arithmetic number, because the mean of its divisors is an integer number (33895680).

Almost surely, 2^842720508 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 842720508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1220244480).

842720508 is an abundant number, since it is smaller than the sum of its proper divisors (1597768452).

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

842720508 is a wasteful number, since it uses less digits than its factorization.

842720508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8207 (or 8202 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 842720508 is about 29029.6487750024. The cubic root of 842720508 is about 944.5563114099.

The spelling of 842720508 in words is "eight hundred forty-two million, seven hundred twenty thousand, five hundred eight".