1850000000 has 144 divisors (see below), whose sum is σ = 4731442890. Its totient is φ = 720000000.

The previous prime is 1849999981. The next prime is 1850000017. The reversal of 1850000000 is 581.

It can be written as a sum of positive squares in 9 ways, for example, as 1844874304 + 5125696 = 42952^2 + 2264^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1850000000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 49999982 + ... + 50000018.

Almost surely, 2^1850000000 is an apocalyptic number.

1850000000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1850000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2365721445).

1850000000 is an abundant number, since it is smaller than the sum of its proper divisors (2881442890).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1850000000 is an frugal number, since it uses more digits than its factorization.

1850000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91 (or 44 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 1850000000 is about 43011.6263352131. The cubic root of 1850000000 is about 1227.6010261921.

Adding to 1850000000 its reverse (581), we get a palindrome (1850000581).

It can be divided in two parts, 18 and 50000000, that multiplied together give a square (900000000 = 30000²).

The spelling of 1850000000 in words is "one billion, eight hundred fifty million", and thus it is an aban number.