1850423985 has 24 divisors (see below), whose sum is σ = 3208429224. Its totient is φ = 986576640.

The previous prime is 1850423969. The next prime is 1850424001. The reversal of 1850423985 is 5893240581.

It is an interprime number because it is at equal distance from previous prime (1850423969) and next prime (1850424001).

It can be written as a sum of positive squares in 4 ways, for example, as 14130081 + 1836293904 = 3759^2 + 42852^2 .

It is not a de Polignac number, because 1850423985 - 2⁴ = 1850423969 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1850423985.

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 23 ways as a sum of consecutive naturals, for example, 224599 + ... + 232691.

It is an arithmetic number, because the mean of its divisors is an integer number (133684551).

Almost surely, 2^1850423985 is an apocalyptic number.

1850423985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1850423985 is a deficient number, since it is larger than the sum of its proper divisors (1358005239).

1850423985 is a wasteful number, since it uses less digits than its factorization.

1850423985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13185 (or 13182 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The square root of 1850423985 is about 43016.5547783641. The cubic root of 1850423985 is about 1227.6948000056.

The spelling of 1850423985 in words is "one billion, eight hundred fifty million, four hundred twenty-three thousand, nine hundred eighty-five".