128428422 has 16 divisors (see below), whose sum is σ = 256979520. Its totient is φ = 42789032.

The previous prime is 128428411. The next prime is 128428439. The reversal of 128428422 is 224824821.

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, 13993 + ... + 21275.

It is an arithmetic number, because the mean of its divisors is an integer number (16061220).

Almost surely, 2^128428422 is an apocalyptic number.

128428422 is an abundant number, since it is smaller than the sum of its proper divisors (128551098).

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

128428422 is a wasteful number, since it uses less digits than its factorization.

128428422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10227.

The product of its digits is 16384, while the sum is 33.

The square root of 128428422 is about 11332.6264387387. The cubic root of 128428422 is about 504.5300624504.

The spelling of 128428422 in words is "one hundred twenty-eight million, four hundred twenty-eight thousand, four hundred twenty-two".