128722794 has 8 divisors (see below), whose sum is σ = 257445600. Its totient is φ = 42907596.

The previous prime is 128722753. The next prime is 128722807. The reversal of 128722794 is 497227821.

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

128722794 is an admirable number.

It is a Curzon number.

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, 10726894 + ... + 10726905.

It is an arithmetic number, because the mean of its divisors is an integer number (32180700).

Almost surely, 2^128722794 is an apocalyptic number.

128722794 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

128722794 is a wasteful number, since it uses less digits than its factorization.

128722794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21453804.

The product of its digits is 112896, while the sum is 42.

The square root of 128722794 is about 11345.6068149747. The cubic root of 128722794 is about 504.9152476795.

The spelling of 128722794 in words is "one hundred twenty-eight million, seven hundred twenty-two thousand, seven hundred ninety-four".