1985855124 has 24 divisors (see below), whose sum is σ = 5054904288. Its totient is φ = 601774240.

The previous prime is 1985855093. The next prime is 1985855171. The reversal of 1985855124 is 4215585891.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 7522047 + ... + 7522310.

It is an arithmetic number, because the mean of its divisors is an integer number (210621012).

Almost surely, 2^1985855124 is an apocalyptic number.

It is an amenable number.

1985855124 is an abundant number, since it is smaller than the sum of its proper divisors (3069049164).

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

1985855124 is a wasteful number, since it uses less digits than its factorization.

1985855124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15044375 (or 15044373 counting only the distinct ones).

The product of its digits is 576000, while the sum is 48.

The square root of 1985855124 is about 44562.9344186399. The cubic root of 1985855124 is about 1256.9437821405.

The spelling of 1985855124 in words is "one billion, nine hundred eighty-five million, eight hundred fifty-five thousand, one hundred twenty-four".