128478136 has 16 divisors (see below), whose sum is σ = 248667840. Its totient is φ = 62166720.

The previous prime is 128478131. The next prime is 128478151. The reversal of 128478136 is 631874821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128478131) 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, 258781 + ... + 259276.

It is an arithmetic number, because the mean of its divisors is an integer number (15541740).

Almost surely, 2^128478136 is an apocalyptic number.

It is an amenable number.

128478136 is a deficient number, since it is larger than the sum of its proper divisors (120189704).

128478136 is a wasteful number, since it uses less digits than its factorization.

128478136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518094 (or 518090 counting only the distinct ones).

The product of its digits is 64512, while the sum is 40.

The square root of 128478136 is about 11334.8196280311. The cubic root of 128478136 is about 504.5951544070.

The spelling of 128478136 in words is "one hundred twenty-eight million, four hundred seventy-eight thousand, one hundred thirty-six".