128758628 has 12 divisors (see below), whose sum is σ = 226973292. Its totient is φ = 63909120.

The previous prime is 128758607. The next prime is 128758667. The reversal of 128758628 is 826857821.

It can be written as a sum of positive squares in 2 ways, for example, as 102050404 + 26708224 = 10102^2 + 5168^2 .

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, 116933 + ... + 118028.

It is an arithmetic number, because the mean of its divisors is an integer number (18914441).

Almost surely, 2^128758628 is an apocalyptic number.

It is an amenable number.

128758628 is a deficient number, since it is larger than the sum of its proper divisors (98214664).

128758628 is a wasteful number, since it uses less digits than its factorization.

128758628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235102 (or 235100 counting only the distinct ones).

The product of its digits is 430080, while the sum is 47.

The square root of 128758628 is about 11347.1859066466. The cubic root of 128758628 is about 504.9620962957.

The spelling of 128758628 in words is "one hundred twenty-eight million, seven hundred fifty-eight thousand, six hundred twenty-eight".