128958922 has 8 divisors (see below), whose sum is σ = 194850756. Its totient is φ = 64008672.

The previous prime is 128958913. The next prime is 128958937. The reversal of 128958922 is 229859821.

It can be written as a sum of positive squares in 2 ways, for example, as 128165041 + 793881 = 11321^2 + 891^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235053 + ... + 235600.

Almost surely, 2^128958922 is an apocalyptic number.

128958922 is a deficient number, since it is larger than the sum of its proper divisors (65891834).

128958922 is a wasteful number, since it uses less digits than its factorization.

128958922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470792.

The product of its digits is 207360, while the sum is 46.

The square root of 128958922 is about 11356.0081895004. The cubic root of 128958922 is about 505.2237965039.

The spelling of 128958922 in words is "one hundred twenty-eight million, nine hundred fifty-eight thousand, nine hundred twenty-two".