128705078 has 8 divisors (see below), whose sum is σ = 196329960. Its totient is φ = 63261760.

The previous prime is 128705077. The next prime is 128705111. The reversal of 128705078 is 870507821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128705077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 545243 + ... + 545478.

It is an arithmetic number, because the mean of its divisors is an integer number (24541245).

Almost surely, 2^128705078 is an apocalyptic number.

128705078 is a deficient number, since it is larger than the sum of its proper divisors (67624882).

128705078 is a wasteful number, since it uses less digits than its factorization.

128705078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090782.

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 128705078 is about 11344.8260453830. The cubic root of 128705078 is about 504.8920829428.

The spelling of 128705078 in words is "one hundred twenty-eight million, seven hundred five thousand, seventy-eight".