1986328080 has 120 divisors (see below), whose sum is σ = 7277212800. Its totient is φ = 481532160.

The previous prime is 1986328079. The next prime is 1986328087. The reversal of 1986328080 is 808236891.

1986328080 is a `hidden beast` number, since 1 + 9 + 8 + 632 + 8 + 0 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1986328087) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117480 + ... + 133319.

It is an arithmetic number, because the mean of its divisors is an integer number (60643440).

Almost surely, 2^1986328080 is an apocalyptic number.

1986328080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1986328080 is an abundant number, since it is smaller than the sum of its proper divisors (5290884720).

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

1986328080 is a wasteful number, since it uses less digits than its factorization.

1986328080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250829 (or 250820 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 1986328080 is about 44568.2407101739. The cubic root of 1986328080 is about 1257.0435597977.

The spelling of 1986328080 in words is "one billion, nine hundred eighty-six million, three hundred twenty-eight thousand, eighty".