128403678 has 32 divisors (see below), whose sum is σ = 277200000. Its totient is φ = 39417696.

The previous prime is 128403659. The next prime is 128403679. The reversal of 128403678 is 876304821.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128403679) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37273 + ... + 40571.

It is an arithmetic number, because the mean of its divisors is an integer number (8662500).

Almost surely, 2^128403678 is an apocalyptic number.

128403678 is an abundant number, since it is smaller than the sum of its proper divisors (148796322).

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

128403678 is a wasteful number, since it uses less digits than its factorization.

128403678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3816.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 128403678 is about 11331.5346709967. The cubic root of 128403678 is about 504.4976581650.

The spelling of 128403678 in words is "one hundred twenty-eight million, four hundred three thousand, six hundred seventy-eight".