1986536384 has 56 divisors (see below), whose sum is σ = 4545165408. Its totient is φ = 843816960.

The previous prime is 1986536341. The next prime is 1986536437. The reversal of 1986536384 is 4836356891.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31004 + ... + 70244.

It is an arithmetic number, because the mean of its divisors is an integer number (81163668).

Almost surely, 2^1986536384 is an apocalyptic number.

1986536384 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1986536384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2272582704).

1986536384 is an abundant number, since it is smaller than the sum of its proper divisors (2558629024).

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

1986536384 is a wasteful number, since it uses less digits than its factorization.

1986536384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39373 (or 39363 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 53.

The square root of 1986536384 is about 44570.5775596413. The cubic root of 1986536384 is about 1257.0874998450.

The spelling of 1986536384 in words is "one billion, nine hundred eighty-six million, five hundred thirty-six thousand, three hundred eighty-four".