8780439616 has 189 divisors, whose sum is σ = 20427467781. Its totient is φ = 3742162944.

The previous prime is 8780439601. The next prime is 8780439617. The reversal of 8780439616 is 6169340878.

It is a happy number.

The square root of 8780439616 is 93704.

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

It can be written as a sum of positive squares in 13 ways, for example, as 3230785600 + 5549654016 = 56840^2 + 74496^2 .

It is a super-2 number, since 2×8780439616² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8780439617) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 165668646 + ... + 165668698.

Almost surely, 2^8780439616 is an apocalyptic number.

8780439616 is the 93704-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8780439616

8780439616 is an abundant number, since it is smaller than the sum of its proper divisors (11647028165).

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

8780439616 is a wasteful number, since it uses less digits than its factorization.

8780439616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 52.

The cubic root of 8780439616 is about 2063.0294146601.

The spelling of 8780439616 in words is "eight billion, seven hundred eighty million, four hundred thirty-nine thousand, six hundred sixteen".