8136728244 has 72 divisors (see below), whose sum is σ = 21362533920. Its totient is φ = 2608200000.

The previous prime is 8136728231. The next prime is 8136728261. The reversal of 8136728244 is 4428276318.

It is a happy number.

8136728244 is a `hidden beast` number, since 8 + 1 + 367 + 282 + 4 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 8136728244.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 246519 + ... + 277569.

It is an arithmetic number, because the mean of its divisors is an integer number (296701860).

Almost surely, 2^8136728244 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 8136728244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10681266960).

8136728244 is an abundant number, since it is smaller than the sum of its proper divisors (13225805676).

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

8136728244 is a wasteful number, since it uses less digits than its factorization.

8136728244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31341 (or 31336 counting only the distinct ones).

The product of its digits is 516096, while the sum is 45.

The square root of 8136728244 is about 90203.8150190999. The cubic root of 8136728244 is about 2011.3297178871.

The spelling of 8136728244 in words is "eight billion, one hundred thirty-six million, seven hundred twenty-eight thousand, two hundred forty-four".