2784540385 has 16 divisors (see below), whose sum is σ = 3661151040. Its totient is φ = 2016267840.

The previous prime is 2784540377. The next prime is 2784540403. The reversal of 2784540385 is 5830454872.

It is not a de Polignac number, because 2784540385 - 2³ = 2784540377 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97947 + ... + 123136.

It is an arithmetic number, because the mean of its divisors is an integer number (228821940).

Almost surely, 2^2784540385 is an apocalyptic number.

It is an amenable number.

2784540385 is a deficient number, since it is larger than the sum of its proper divisors (876610655).

2784540385 is a wasteful number, since it uses less digits than its factorization.

2784540385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221328.

The product of its (nonzero) digits is 1075200, while the sum is 46.

The square root of 2784540385 is about 52768.7443947646. The cubic root of 2784540385 is about 1406.8609451110.

It can be divided in two parts, 2784 and 540385, that added together give a square (543169 = 737²).

The spelling of 2784540385 in words is "two billion, seven hundred eighty-four million, five hundred forty thousand, three hundred eighty-five".