128708645 has 16 divisors (see below), whose sum is σ = 169474032. Its totient is φ = 93250560.

The previous prime is 128708627. The next prime is 128708651. The reversal of 128708645 is 546807821.

It can be written as a sum of positive squares in 8 ways, for example, as 362404 + 128346241 = 602^2 + 11329^2 .

It is not a de Polignac number, because 128708645 - 2¹² = 128704549 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15236 + ... + 22125.

It is an arithmetic number, because the mean of its divisors is an integer number (10592127).

Almost surely, 2^128708645 is an apocalyptic number.

It is an amenable number.

128708645 is a deficient number, since it is larger than the sum of its proper divisors (40765387).

128708645 is a wasteful number, since it uses less digits than its factorization.

128708645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37432.

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

The square root of 128708645 is about 11344.9832525218. The cubic root of 128708645 is about 504.8967471810.

The spelling of 128708645 in words is "one hundred twenty-eight million, seven hundred eight thousand, six hundred forty-five".