1659105728 has 56 divisors (see below), whose sum is σ = 3779715072. Its totient is φ = 707814144.

The previous prime is 1659105697. The next prime is 1659105731. The reversal of 1659105728 is 8275019561.

It is a tau number, because it is divible by the number of its divisors (56).

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, 91601 + ... + 108207.

It is an arithmetic number, because the mean of its divisors is an integer number (67494912).

Almost surely, 2^1659105728 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 1659105728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1889857536).

1659105728 is an abundant number, since it is smaller than the sum of its proper divisors (2120609344).

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

1659105728 is a wasteful number, since it uses less digits than its factorization.

1659105728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16849 (or 16839 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 44.

The square root of 1659105728 is about 40732.1215749929. The cubic root of 1659105728 is about 1183.8354866384.

The spelling of 1659105728 in words is "one billion, six hundred fifty-nine million, one hundred five thousand, seven hundred twenty-eight".