4090605871 has 4 divisors (see below), whose sum is σ = 4462479144. Its totient is φ = 3718732600.

The previous prime is 4090605847. The next prime is 4090605887. The reversal of 4090605871 is 1785060904.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 4090605871 - 2⁹ = 4090605359 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4090605371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185936620 + ... + 185936641.

It is an arithmetic number, because the mean of its divisors is an integer number (1115619786).

Almost surely, 2^4090605871 is an apocalyptic number.

4090605871 is a deficient number, since it is larger than the sum of its proper divisors (371873273).

4090605871 is a wasteful number, since it uses less digits than its factorization.

4090605871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371873272.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 4090605871 is about 63957.8444836910. The cubic root of 4090605871 is about 1599.2973309084.

It can be divided in two parts, 4090 and 605871, that added together give a square (609961 = 781²).

The spelling of 4090605871 in words is "four billion, ninety million, six hundred five thousand, eight hundred seventy-one".