128752628 has 24 divisors (see below), whose sum is σ = 244395144. Its totient is φ = 59110400.

The previous prime is 128752601. The next prime is 128752633. The reversal of 128752628 is 826257821.

It can be written as a sum of positive squares in 4 ways, for example, as 21049744 + 107702884 = 4588^2 + 10378^2 .

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 20303 + ... + 25878.

It is an arithmetic number, because the mean of its divisors is an integer number (10183131).

Almost surely, 2^128752628 is an apocalyptic number.

It is an amenable number.

128752628 is a deficient number, since it is larger than the sum of its proper divisors (115642516).

128752628 is a wasteful number, since it uses less digits than its factorization.

128752628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46243 (or 46241 counting only the distinct ones).

The product of its digits is 107520, while the sum is 41.

The square root of 128752628 is about 11346.9215208355. The cubic root of 128752628 is about 504.9542526281.

The spelling of 128752628 in words is "one hundred twenty-eight million, seven hundred fifty-two thousand, six hundred twenty-eight".