8705780500 has 24 divisors (see below), whose sum is σ = 19013425704. Its totient is φ = 3482312000.

The previous prime is 8705780497. The next prime is 8705780507. The reversal of 8705780500 is 50875078.

It can be written as a sum of positive squares in 4 ways, for example, as 1569585924 + 7136194576 = 39618^2 + 84476^2 .

It is a super-2 number, since 2×8705780500² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8705780507) 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, 8705281 + ... + 8706280.

It is an arithmetic number, because the mean of its divisors is an integer number (792226071).

Almost surely, 2^8705780500 is an apocalyptic number.

It is an amenable number.

8705780500 is an abundant number, since it is smaller than the sum of its proper divisors (10307645204).

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

8705780500 is a wasteful number, since it uses less digits than its factorization.

8705780500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17411580 (or 17411568 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 40.

The square root of 8705780500 is about 93304.7721180434. The cubic root of 8705780500 is about 2057.1655254290.

The spelling of 8705780500 in words is "eight billion, seven hundred five million, seven hundred eighty thousand, five hundred".