128707890042 has 16 divisors (see below), whose sum is σ = 260674208640. Its totient is φ = 42359558592.

The previous prime is 128707890007. The next prime is 128707890043. The reversal of 128707890042 is 240098707821.

It is a junction number, because it is equal to n+sod(n) for n = 128707889973 and 128707890000.

It is not an unprimeable number, because it can be changed into a prime (128707890043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135767343 + ... + 135768290.

It is an arithmetic number, because the mean of its divisors is an integer number (16292138040).

Almost surely, 2^128707890042 is an apocalyptic number.

128707890042 is an abundant number, since it is smaller than the sum of its proper divisors (131966318598).

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

128707890042 is a wasteful number, since it uses less digits than its factorization.

128707890042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271535717.

The product of its (nonzero) digits is 451584, while the sum is 48.

The spelling of 128707890042 in words is "one hundred twenty-eight billion, seven hundred seven million, eight hundred ninety thousand, forty-two".