1806859042 has 16 divisors (see below), whose sum is σ = 2873529432. Its totient is φ = 849157120.

The previous prime is 1806859013. The next prime is 1806859051. The reversal of 1806859042 is 2409586081.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 726356401 + 1080502641 = 26951^2 + 32871^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1806859042.

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 7 ways as a sum of consecutive naturals, for example, 9043 + ... + 60790.

Almost surely, 2^1806859042 is an apocalyptic number.

1806859042 is a deficient number, since it is larger than the sum of its proper divisors (1066670390).

1806859042 is a wasteful number, since it uses less digits than its factorization.

1806859042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70613.

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 1806859042 is about 42507.1645961007. The cubic root of 1806859042 is about 1217.9835547008.

The spelling of 1806859042 in words is "one billion, eight hundred six million, eight hundred fifty-nine thousand, forty-two".