128494678 has 16 divisors (see below), whose sum is σ = 207763920. Its totient is φ = 59249376.

The previous prime is 128494669. The next prime is 128494703. The reversal of 128494678 is 876494821.

It is a happy number.

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, 41053 + ... + 44071.

It is an arithmetic number, because the mean of its divisors is an integer number (12985245).

Almost surely, 2^128494678 is an apocalyptic number.

128494678 is a deficient number, since it is larger than the sum of its proper divisors (79269242).

128494678 is a wasteful number, since it uses less digits than its factorization.

128494678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4671.

The product of its digits is 774144, while the sum is 49.

The square root of 128494678 is about 11335.5493029672. The cubic root of 128494678 is about 504.6168095957.

The spelling of 128494678 in words is "one hundred twenty-eight million, four hundred ninety-four thousand, six hundred seventy-eight".