1985450218 has 8 divisors (see below), whose sum is σ = 2986472160. Its totient is φ = 989959500.

The previous prime is 1985450189. The next prime is 1985450231. The reversal of 1985450218 is 8120545891.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 1381908 + ... + 1383343.

It is an arithmetic number, because the mean of its divisors is an integer number (373309020).

Almost surely, 2^1985450218 is an apocalyptic number.

1985450218 is a deficient number, since it is larger than the sum of its proper divisors (1001021942).

1985450218 is a wasteful number, since it uses less digits than its factorization.

1985450218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2765612.

The product of its (nonzero) digits is 115200, while the sum is 43.

The square root of 1985450218 is about 44558.3911065020. The cubic root of 1985450218 is about 1256.8583481349.

The spelling of 1985450218 in words is "one billion, nine hundred eighty-five million, four hundred fifty thousand, two hundred eighteen".