2805784397 has 16 divisors (see below), whose sum is σ = 3367748160. Its totient is φ = 2309306112.

The previous prime is 2805784349. The next prime is 2805784403. The reversal of 2805784397 is 7934875082.

It is not a de Polignac number, because 2805784397 - 2¹² = 2805780301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2805784327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 329903 + ... + 338300.

It is an arithmetic number, because the mean of its divisors is an integer number (210484260).

Almost surely, 2^2805784397 is an apocalyptic number.

It is an amenable number.

2805784397 is a deficient number, since it is larger than the sum of its proper divisors (561963763).

2805784397 is a wasteful number, since it uses less digits than its factorization.

2805784397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668252.

The product of its (nonzero) digits is 3386880, while the sum is 53.

The square root of 2805784397 is about 52969.6554359192. The cubic root of 2805784397 is about 1410.4296591441.

The spelling of 2805784397 in words is "two billion, eight hundred five million, seven hundred eighty-four thousand, three hundred ninety-seven".