128642804 has 12 divisors (see below), whose sum is σ = 225640800. Its totient is φ = 64174008.

The previous prime is 128642803. The next prime is 128642809. The reversal of 128642804 is 408246821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128642803) 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, 34874 + ... + 38385.

It is an arithmetic number, because the mean of its divisors is an integer number (18803400).

Almost surely, 2^128642804 is an apocalyptic number.

It is an amenable number.

128642804 is a deficient number, since it is larger than the sum of its proper divisors (96997996).

128642804 is a wasteful number, since it uses less digits than its factorization.

128642804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73702 (or 73700 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 35.

The square root of 128642804 is about 11342.0811141518. The cubic root of 128642804 is about 504.8106390649.

The spelling of 128642804 in words is "one hundred twenty-eight million, six hundred forty-two thousand, eight hundred four".