1985411512 has 16 divisors (see below), whose sum is σ = 4254453360. Its totient is φ = 850890624.

The previous prime is 1985411501. The next prime is 1985411513. The reversal of 1985411512 is 2151145891.

It is a happy number.

It is a super-2 number, since 2×1985411512² = 7883717743964252288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985411513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17726833 + ... + 17726944.

It is an arithmetic number, because the mean of its divisors is an integer number (265903335).

Almost surely, 2^1985411512 is an apocalyptic number.

It is an amenable number.

1985411512 is an abundant number, since it is smaller than the sum of its proper divisors (2269041848).

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

1985411512 is a wasteful number, since it uses less digits than its factorization.

1985411512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35453790 (or 35453786 counting only the distinct ones).

The product of its digits is 14400, while the sum is 37.

The square root of 1985411512 is about 44557.9567754178. The cubic root of 1985411512 is about 1256.8501806716.

The spelling of 1985411512 in words is "one billion, nine hundred eighty-five million, four hundred eleven thousand, five hundred twelve".