128605158 has 40 divisors (see below), whose sum is σ = 314372520. Its totient is φ = 38970720.

The previous prime is 128605157. The next prime is 128605171. The reversal of 128605158 is 851506821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128605157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 34303 + ... + 37866.

It is an arithmetic number, because the mean of its divisors is an integer number (7859313).

Almost surely, 2^128605158 is an apocalyptic number.

128605158 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

128605158 is an abundant number, since it is smaller than the sum of its proper divisors (185767362).

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

128605158 is a wasteful number, since it uses less digits than its factorization.

128605158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72194 (or 72185 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 36.

The square root of 128605158 is about 11340.4214207409. The cubic root of 128605158 is about 504.7613917050.

The spelling of 128605158 in words is "one hundred twenty-eight million, six hundred five thousand, one hundred fifty-eight".