128528798 has 4 divisors (see below), whose sum is σ = 192793200. Its totient is φ = 64264398.

The previous prime is 128528797. The next prime is 128528839. The reversal of 128528798 is 897825821.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128528791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32132198 + ... + 32132201.

It is an arithmetic number, because the mean of its divisors is an integer number (48198300).

Almost surely, 2^128528798 is an apocalyptic number.

128528798 is a deficient number, since it is larger than the sum of its proper divisors (64264402).

128528798 is an equidigital number, since it uses as much as digits as its factorization.

128528798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64264401.

The product of its digits is 645120, while the sum is 50.

The square root of 128528798 is about 11337.0542029224. The cubic root of 128528798 is about 504.6614703346.

The spelling of 128528798 in words is "one hundred twenty-eight million, five hundred twenty-eight thousand, seven hundred ninety-eight".