8784138512 has 40 divisors (see below), whose sum is σ = 17703580440. Its totient is φ = 4217149440.

The previous prime is 8784138511. The next prime is 8784138547. The reversal of 8784138512 is 2158314878.

It can be written as a sum of positive squares in 4 ways, for example, as 22429696 + 8761708816 = 4736^2 + 93604^2 .

It is a super-3 number, since 3×8784138512³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (8784138511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31688 + ... + 136280.

It is an arithmetic number, because the mean of its divisors is an integer number (442589511).

Almost surely, 2^8784138512 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 8784138512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8851790220).

8784138512 is an abundant number, since it is smaller than the sum of its proper divisors (8919441928).

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

8784138512 is a wasteful number, since it uses less digits than its factorization.

8784138512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104811 (or 104805 counting only the distinct ones).

The product of its digits is 430080, while the sum is 47.

The square root of 8784138512 is about 93723.7350514799. The cubic root of 8784138512 is about 2063.3190683406.

The spelling of 8784138512 in words is "eight billion, seven hundred eighty-four million, one hundred thirty-eight thousand, five hundred twelve".