1986147648 has 112 divisors (see below), whose sum is σ = 5881624000. Its totient is φ = 657206784.

The previous prime is 1986147637. The next prime is 1986147671. The reversal of 1986147648 is 8467416891.

1986147648 is a `hidden beast` number, since 19 + 8 + 614 + 7 + 6 + 4 + 8 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 1986147594 and 1986147603.

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 15 ways as a sum of consecutive naturals, for example, 236058 + ... + 244326.

It is an arithmetic number, because the mean of its divisors is an integer number (52514500).

Almost surely, 2^1986147648 is an apocalyptic number.

1986147648 is a gapful number since it is divisible by the number (18) 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 1986147648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2940812000).

1986147648 is an abundant number, since it is smaller than the sum of its proper divisors (3895476352).

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

1986147648 is a wasteful number, since it uses less digits than its factorization.

1986147648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8429 (or 8413 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 1986147648 is about 44566.2164425027. The cubic root of 1986147648 is about 1257.0054966409.

The spelling of 1986147648 in words is "one billion, nine hundred eighty-six million, one hundred forty-seven thousand, six hundred forty-eight".