1989014784 has 72 divisors (see below), whose sum is σ = 5301580032. Its totient is φ = 662016000.

The previous prime is 1989014767. The next prime is 1989014821. The reversal of 1989014784 is 4874109891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 661284 + ... + 664284.

It is an arithmetic number, because the mean of its divisors is an integer number (73633056).

Almost surely, 2^1989014784 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 1989014784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2650790016).

1989014784 is an abundant number, since it is smaller than the sum of its proper divisors (3312565248).

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

1989014784 is an equidigital number, since it uses as much as digits as its factorization.

1989014784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3883 (or 3869 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 51.

The square root of 1989014784 is about 44598.3719882240. The cubic root of 1989014784 is about 1257.6100627881.

The spelling of 1989014784 in words is "one billion, nine hundred eighty-nine million, fourteen thousand, seven hundred eighty-four".