128606478 has 256 divisors, whose sum is σ = 387072000. Its totient is φ = 27941760.

The previous prime is 128606477. The next prime is 128606539. The reversal of 128606478 is 874606821.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128606477) by changing a digit.

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 127 ways as a sum of consecutive naturals, for example, 5591575 + ... + 5591597.

It is an arithmetic number, because the mean of its divisors is an integer number (1512000).

Almost surely, 2^128606478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128606478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193536000).

128606478 is an abundant number, since it is smaller than the sum of its proper divisors (258465522).

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

128606478 is a wasteful number, since it uses less digits than its factorization.

128606478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 128606478 is about 11340.4796194870. The cubic root of 128606478 is about 504.7631186517.

It can be divided in two parts, 128 and 606478, that added together give a palindrome (606606).

The spelling of 128606478 in words is "one hundred twenty-eight million, six hundred six thousand, four hundred seventy-eight".