128502798 has 16 divisors (see below), whose sum is σ = 258226176. Its totient is φ = 42630840.

The previous prime is 128502797. The next prime is 128502811. The reversal of 128502798 is 897205821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128502797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49486 + ... + 52017.

It is an arithmetic number, because the mean of its divisors is an integer number (16139136).

Almost surely, 2^128502798 is an apocalyptic number.

128502798 is an abundant number, since it is smaller than the sum of its proper divisors (129723378).

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

128502798 is a wasteful number, since it uses less digits than its factorization.

128502798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101719.

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 128502798 is about 11335.9074625722. The cubic root of 128502798 is about 504.6274388353.

The spelling of 128502798 in words is "one hundred twenty-eight million, five hundred two thousand, seven hundred ninety-eight".