135998128 has 40 divisors (see below), whose sum is σ = 307296800. Its totient is φ = 58282560.

The previous prime is 135998117. The next prime is 135998129. The reversal of 135998128 is 821899531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135998129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6903 + ... + 17878.

It is an arithmetic number, because the mean of its divisors is an integer number (7682420).

Almost surely, 2^135998128 is an apocalyptic number.

It is an amenable number.

135998128 is an abundant number, since it is smaller than the sum of its proper divisors (171298672).

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

135998128 is an equidigital number, since it uses as much as digits as its factorization.

135998128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24810 (or 24790 counting only the distinct ones).

The product of its digits is 155520, while the sum is 46.

The square root of 135998128 is about 11661.8235280766. The cubic root of 135998128 is about 514.2539585918.

The spelling of 135998128 in words is "one hundred thirty-five million, nine hundred ninety-eight thousand, one hundred twenty-eight".