128768619 has 24 divisors (see below), whose sum is σ = 200188560. Its totient is φ = 73410624.

The previous prime is 128768611. The next prime is 128768623. The reversal of 128768619 is 916867821.

It is not a de Polignac number, because 128768619 - 2³ = 128768611 is a prime.

It is a super-2 number, since 2×128768619² = 33162714478334322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128768611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89397 + ... + 90825.

It is an arithmetic number, because the mean of its divisors is an integer number (8341190).

Almost surely, 2^128768619 is an apocalyptic number.

128768619 is a deficient number, since it is larger than the sum of its proper divisors (71419941).

128768619 is a wasteful number, since it uses less digits than its factorization.

128768619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2059 (or 2052 counting only the distinct ones).

The product of its digits is 290304, while the sum is 48.

The square root of 128768619 is about 11347.6261394179. The cubic root of 128768619 is about 504.9751567689.

The spelling of 128768619 in words is "one hundred twenty-eight million, seven hundred sixty-eight thousand, six hundred nineteen".