2785411729 has 9 divisors (see below), whose sum is σ = 2821818673. Its totient is φ = 2749470592.

The previous prime is 2785411709. The next prime is 2785411747. The reversal of 2785411729 is 9271145872.

The square root of 2785411729 is 52777.

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

It can be written as a sum of positive squares in 4 ways, for example, as 127803025 + 2657608704 = 11305^2 + 51552^2 .

It is not a de Polignac number, because 2785411729 - 2⁹ = 2785411217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2785411709) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4696857 + ... + 4697449.

Almost surely, 2^2785411729 is an apocalyptic number.

2785411729 is the 52777-th square number.

2785411729 is the 26389-th centered octagonal number.

It is an amenable number.

2785411729 is a deficient number, since it is larger than the sum of its proper divisors (36406944).

2785411729 is an frugal number, since it uses more digits than its factorization.

2785411729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1364 (or 682 counting only the distinct ones).

The product of its digits is 282240, while the sum is 46.

The cubic root of 2785411729 is about 1407.0076757296.

The spelling of 2785411729 in words is "two billion, seven hundred eighty-five million, four hundred eleven thousand, seven hundred twenty-nine".