128349568 has 32 divisors (see below), whose sum is σ = 266819760. Its totient is φ = 61383168.

The previous prime is 128349509. The next prime is 128349583. The reversal of 128349568 is 865943821.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×128349568² = 32947223211573248, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 18855 + ... + 24742.

Almost surely, 2^128349568 is an apocalyptic number.

It is an amenable number.

128349568 is an abundant number, since it is smaller than the sum of its proper divisors (138470192).

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

128349568 is an equidigital number, since it uses as much as digits as its factorization.

128349568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43634 (or 43622 counting only the distinct ones).

The product of its digits is 414720, while the sum is 46.

The square root of 128349568 is about 11329.1468346032. The cubic root of 128349568 is about 504.4267822000.

The spelling of 128349568 in words is "one hundred twenty-eight million, three hundred forty-nine thousand, five hundred sixty-eight".