1889028648 has 128 divisors (see below), whose sum is σ = 5833497600. Its totient is φ = 562464000.

The previous prime is 1889028641. The next prime is 1889028667. The reversal of 1889028648 is 8468209881.

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 = 1889028594 and 1889028603.

It is not an unprimeable number, because it can be changed into a prime (1889028641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76198 + ... + 97898.

It is an arithmetic number, because the mean of its divisors is an integer number (45574200).

Almost surely, 2^1889028648 is an apocalyptic number.

1889028648 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 1889028648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2916748800).

1889028648 is an abundant number, since it is smaller than the sum of its proper divisors (3944468952).

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

1889028648 is a wasteful number, since it uses less digits than its factorization.

1889028648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21760 (or 21750 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 54.

The square root of 1889028648 is about 43462.9571934538. The cubic root of 1889028648 is about 1236.1737431318.

The spelling of 1889028648 in words is "one billion, eight hundred eighty-nine million, twenty-eight thousand, six hundred forty-eight".