1985502318 has 32 divisors (see below), whose sum is σ = 4425891840. Its totient is φ = 590117760.

The previous prime is 1985502307. The next prime is 1985502319. The reversal of 1985502318 is 8132055891.

It is a self number, because there is not a number n which added to its sum of digits gives 1985502318.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985502319) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 510318 + ... + 514193.

It is an arithmetic number, because the mean of its divisors is an integer number (138309120).

Almost surely, 2^1985502318 is an apocalyptic number.

1985502318 is an abundant number, since it is smaller than the sum of its proper divisors (2440389522).

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

1985502318 is a wasteful number, since it uses less digits than its factorization.

1985502318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024552.

The product of its (nonzero) digits is 86400, while the sum is 42.

The square root of 1985502318 is about 44558.9757288024. The cubic root of 1985502318 is about 1256.8693417367.

The spelling of 1985502318 in words is "one billion, nine hundred eighty-five million, five hundred two thousand, three hundred eighteen".