8213439568 has 40 divisors (see below), whose sum is σ = 16902960552. Its totient is φ = 3852914688.

The previous prime is 8213439557. The next prime is 8213439599. The reversal of 8213439568 is 8659343128.

It can be written as a sum of positive squares in 4 ways, for example, as 5184 + 8213434384 = 72^2 + 90628^2 .

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38596 + ... + 133852.

Almost surely, 2^8213439568 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 8213439568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8451480276).

8213439568 is an abundant number, since it is smaller than the sum of its proper divisors (8689520984).

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

8213439568 is a wasteful number, since it uses less digits than its factorization.

8213439568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95599 (or 95593 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 49.

The square root of 8213439568 is about 90628.0286004280. The cubic root of 8213439568 is about 2017.6307522539.

The spelling of 8213439568 in words is "eight billion, two hundred thirteen million, four hundred thirty-nine thousand, five hundred sixty-eight".