1985846544 has 240 divisors, whose sum is σ = 6402090240. Its totient is φ = 590820480.

The previous prime is 1985846509. The next prime is 1985846557. The reversal of 1985846544 is 4456485891.

1985846544 is a `hidden beast` number, since 1 + 9 + 8 + 58 + 46 + 544 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2522919 + ... + 2523705.

It is an arithmetic number, because the mean of its divisors is an integer number (26675376).

Almost surely, 2^1985846544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1985846544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3201045120).

1985846544 is an abundant number, since it is smaller than the sum of its proper divisors (4416243696).

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

1985846544 is a wasteful number, since it uses less digits than its factorization.

1985846544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880 (or 862 counting only the distinct ones).

The product of its digits is 5529600, while the sum is 54.

The square root of 1985846544 is about 44562.8381501897. The cubic root of 1985846544 is about 1256.9419719056.

The spelling of 1985846544 in words is "one billion, nine hundred eighty-five million, eight hundred forty-six thousand, five hundred forty-four".