5781855 has 16 divisors (see below), whose sum is σ = 9653760. Its totient is φ = 2949408.

The previous prime is 5781847. The next prime is 5781857. The reversal of 5781855 is 5581875.

It is not a de Polignac number, because 5781855 - 2³ = 5781847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5781857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8035 + ... + 8724.

It is an arithmetic number, because the mean of its divisors is an integer number (603360).

Almost surely, 2^5781855 is an apocalyptic number.

5781855 is a deficient number, since it is larger than the sum of its proper divisors (3871905).

5781855 is a wasteful number, since it uses less digits than its factorization.

5781855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16790.

The product of its digits is 56000, while the sum is 39.

The square root of 5781855 is about 2404.5488142269. The cubic root of 5781855 is about 179.4826192361.

The spelling of 5781855 in words is "five million, seven hundred eighty-one thousand, eight hundred fifty-five".