128799798 has 8 divisors (see below), whose sum is σ = 257599608. Its totient is φ = 42933264.

The previous prime is 128799767. The next prime is 128799851. The reversal of 128799798 is 897997821.

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

128799798 is an admirable number.

It is a congruent 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, 10733311 + ... + 10733322.

It is an arithmetic number, because the mean of its divisors is an integer number (32199951).

Almost surely, 2^128799798 is an apocalyptic number.

128799798 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.

128799798 is a wasteful number, since it uses less digits than its factorization.

128799798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21466638.

The product of its digits is 4572288, while the sum is 60.

The square root of 128799798 is about 11348.9998678298. Note that the first 3 decimals coincide. The cubic root of 128799798 is about 505.0159103571.

The spelling of 128799798 in words is "one hundred twenty-eight million, seven hundred ninety-nine thousand, seven hundred ninety-eight".