128579445 has 12 divisors (see below), whose sum is σ = 222871116. Its totient is φ = 68575680.

The previous prime is 128579443. The next prime is 128579527. The reversal of 128579445 is 544975821.

It can be written as a sum of positive squares in 2 ways, for example, as 39050001 + 89529444 = 6249^2 + 9462^2 .

It is not a de Polignac number, because 128579445 - 2¹ = 128579443 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 2857321 = 128579445 / (1 + 2 + 8 + 5 + 7 + 9 + 4 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 128579445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128579443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1428616 + ... + 1428705.

It is an arithmetic number, because the mean of its divisors is an integer number (18572593).

Almost surely, 2^128579445 is an apocalyptic number.

128579445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128579445 is a deficient number, since it is larger than the sum of its proper divisors (94291671).

128579445 is a wasteful number, since it uses less digits than its factorization.

128579445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2857332 (or 2857329 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 128579445 is about 11339.2876760403. The cubic root of 128579445 is about 504.7277492110.

The spelling of 128579445 in words is "one hundred twenty-eight million, five hundred seventy-nine thousand, four hundred forty-five".