8439361956 has 81 divisors (see below), whose sum is σ = 21775035009. Its totient is φ = 2755980000.

The previous prime is 8439361943. The next prime is 8439361967. The reversal of 8439361956 is 6591639348.

The square root of 8439361956 is 91866.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 274432356 + 8164929600 = 16566^2 + 90360^2 .

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 26 ways as a sum of consecutive naturals, for example, 33622831 + ... + 33623081.

Almost surely, 2^8439361956 is an apocalyptic number.

8439361956 is the 91866-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8439361956

8439361956 is an abundant number, since it is smaller than the sum of its proper divisors (13335673053).

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

8439361956 is a wasteful number, since it uses less digits than its factorization.

8439361956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634 (or 317 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 54.

The cubic root of 8439361956 is about 2035.9629533184.

The spelling of 8439361956 in words is "eight billion, four hundred thirty-nine million, three hundred sixty-one thousand, nine hundred fifty-six".