1889610648 has 128 divisors (see below), whose sum is σ = 5097062400. Its totient is φ = 581986944.

The previous prime is 1889610631. The next prime is 1889610649. The reversal of 1889610648 is 8460169881.

It is a self number, because there is not a number n which added to its sum of digits gives 1889610648.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1889610649) 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 31 ways as a sum of consecutive naturals, for example, 3879861 + ... + 3880347.

It is an arithmetic number, because the mean of its divisors is an integer number (39820800).

Almost surely, 2^1889610648 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 1889610648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2548531200).

1889610648 is an abundant number, since it is smaller than the sum of its proper divisors (3207451752).

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

1889610648 is a wasteful number, since it uses less digits than its factorization.

1889610648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709 (or 705 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 51.

The square root of 1889610648 is about 43469.6520344941. The cubic root of 1889610648 is about 1236.3006830180.

The spelling of 1889610648 in words is "one billion, eight hundred eighty-nine million, six hundred ten thousand, six hundred forty-eight".