128478678 has 16 divisors (see below), whose sum is σ = 261806256. Its totient is φ = 42018080.

The previous prime is 128478653. The next prime is 128478697. The reversal of 128478678 is 876874821.

It is a self number, because there is not a number n which added to its sum of digits gives 128478678.

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, 201693 + ... + 202328.

It is an arithmetic number, because the mean of its divisors is an integer number (16362891).

Almost surely, 2^128478678 is an apocalyptic number.

128478678 is an abundant number, since it is smaller than the sum of its proper divisors (133327578).

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

128478678 is a wasteful number, since it uses less digits than its factorization.

128478678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404079.

The product of its digits is 1204224, while the sum is 51.

The square root of 128478678 is about 11334.8435366352. The cubic root of 128478678 is about 504.5958639705.

The spelling of 128478678 in words is "one hundred twenty-eight million, four hundred seventy-eight thousand, six hundred seventy-eight".