2816660385 has 432 divisors, whose sum is σ = 7152582528. Its totient is φ = 1053803520.

The previous prime is 2816660333. The next prime is 2816660401. The reversal of 2816660385 is 5830666182.

It is not a de Polignac number, because 2816660385 - 2⁹ = 2816659873 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2816660385.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 431 ways as a sum of consecutive naturals, for example, 122463484 + ... + 122463506.

It is an arithmetic number, because the mean of its divisors is an integer number (16556904).

Almost surely, 2^2816660385 is an apocalyptic number.

It is an amenable number.

2816660385 is an abundant number, since it is smaller than the sum of its proper divisors (4335922143).

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

2816660385 is a wasteful number, since it uses less digits than its factorization.

2816660385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 2816660385 is about 53072.2185799689. The cubic root of 2816660385 is about 1412.2497132433.

It can be divided in two parts, 281 and 6660385, that added together give a palindrome (6660666).

The spelling of 2816660385 in words is "two billion, eight hundred sixteen million, six hundred sixty thousand, three hundred eighty-five".