1989314208 has 96 divisors (see below), whose sum is σ = 6631067520. Its totient is φ = 568373760.

The previous prime is 1989314191. The next prime is 1989314209. The reversal of 1989314208 is 8024139891.

1989314208 is a `hidden beast` number, since 198 + 9 + 31 + 420 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (1989314209) by changing a digit.

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, 158413 + ... + 170508.

It is an arithmetic number, because the mean of its divisors is an integer number (69073620).

Almost surely, 2^1989314208 is an apocalyptic number.

1989314208 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1989314208 is an abundant number, since it is smaller than the sum of its proper divisors (4641753312).

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

1989314208 is a wasteful number, since it uses less digits than its factorization.

1989314208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328947 (or 328933 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 1989314208 is about 44601.7287557332. The cubic root of 1989314208 is about 1257.6731660130.

The spelling of 1989314208 in words is "one billion, nine hundred eighty-nine million, three hundred fourteen thousand, two hundred eight".