128788794 has 12 divisors (see below), whose sum is σ = 279042426. Its totient is φ = 42929592.

The previous prime is 128788747. The next prime is 128788811. The reversal of 128788794 is 497887821.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 115283169 + 13505625 = 10737^2 + 3675^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 128788794.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3577449 + ... + 3577484.

Almost surely, 2^128788794 is an apocalyptic number.

128788794 is an abundant number, since it is smaller than the sum of its proper divisors (150253632).

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

128788794 is a wasteful number, since it uses less digits than its factorization.

128788794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7154941 (or 7154938 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 54.

The square root of 128788794 is about 11348.5150570460. The cubic root of 128788794 is about 505.0015279502.

The spelling of 128788794 in words is "one hundred twenty-eight million, seven hundred eighty-eight thousand, seven hundred ninety-four".